* Fix rendering of TreeGrid's frozen columns after hierarchy-column reset (#12028)

* Add tests

* Fix getVisibleFrozenColumnCount() if SelectionMode is multi

* Update ComboBox popup position comparison to use correct top value. (#12041)

Fixes #12029

* Clear thread local instances on connection lost in push handler (#12042)

Adopted from https://github.com/vaadin/flow/pull/8567

Co-authored-by: Tarek Oraby <42799254+tarekoraby@users.noreply.github.com>
Co-authored-by: Anna Koskinen <Ansku@users.noreply.github.com>
Co-authored-by: Tatu Lund <tatu@vaadin.com>

* Fix to compatibility Grid sorting after removing multi-select. (#12012)

Adapted from V7 fix #10999

Fixes #11993

IllegalStateException may occur if user has scrolled Grid (compatibility library version) so that Escalator has updated, and row under Editor is no longer there

Issue #11463

Fixes: https://github.com/vaadin/framework/issues/11958

Authored-by: Tatu Lund <tatu@vaadin.com>

Issue #11893

Authored-by: Zhe Sun <31067185+ZheSun88@users.noreply.github.com>

* Updated release-notes.html

* Support for javax.validation @NotEmpty annotation. (#11985)

Fixes #10914

Fixes #10844

Fixes #11958

Fixes #10580

In Firefox and IE11, the 'Create Link' button of the RichTextArea (RTA) only works by turning some highlighted text into a link (by adding the inserted URI as the href property of the text). In that, the RTA in these two browsers behave similarly to the way it does in Chrome and Edge. However, in Firefox and IE11, clicking the 'Create Link' button has no effect if no text is pre-selected by the user. This is different from the button's behavior in Chrome and Edge where the user's provided URI is inserted, both, as the displayed text and its href property if no text is highlighted.

This fix enables the RTA's 'Create Link' button to work consistently across the supported browsers. Specifically, (and in addition to enabling adding the href property of a highlighted text), this fix enables Firefox and IE11 to also insert a new Uri as a text and its href property if no text is already highlighted.

fixes #11888

* Take overlays into account in getConnectorForElement.

Fixes #11212

Fixes #11824

Fixes #11973

The previous patch https://github.com/vaadin/framework/pull/11951 did fix the problem (frozen column indicator wrongly positioned)  it was meant to, but caused a regression in hiding / un-hiding. 

This new fix addresses both problems, i.e. it applies multiselect column compensation in other way, without causing problem in hiding / un-hiding logic

Fixes https://github.com/vaadin/framework/issues/11970

* Don't center a window that has already been removed.

Fixes #11942

* Updating release notes

* Fixing typo

Cherry pick from
https://github.com/vaadin/framework/pull/11946

Tree class doesn't currently provide an obvious way that would enable a Tree object to be treated as a multi select. This commit extends the Tree API, enabling it to be used as a multi select, which would importantly facilitate the selection/deselection of multiple items in trees whose SelectionMode is MULTI.

closes #11948

HierarchyMapper. getParentIndex() method has a different JavaDoc from the HierarchicalDataCommunicator. This is a simple fix for that.

https://github.com/vaadin/framework/blob/master/server/src/main/java/com/vaadin/data/provider/HierarchyMapper.java#L96

DateTimeField and DateField currently implement a hardcoded logic by which they adjust their time zone names to display daylight-saving time (DST) zone names. Specifically, this hardcoded logic only adjusts the displayed date to DST format if that date falls in one of the years between 1980 and the following 20 years in the future from the current date (that is, until 2040 at the time of this commit).

For some use cases, this is problematic because it is desirable to display proper DST-adjusted time zones beyond the 20 years limit (and possibly also before 1980).

Rather than choosing another arbitrary, hardcoded threshold, this commit extends the AbstractDateField API to allow the user to choose the range (start and end years) between which the DST transition dates are calculated (and hence displayed properly). If the user doesn't invoke this new API, DateTimeField and DateField will default to behave according the existing logic (i.e. display DST zone names between 1980 and 20 years into the future).

Closes #11919

- Enable / disable all validators on Binder level
- Enable / disable validators on Binding level
- add writeBeanAsDraft(bean,boolean) for writing draft bean with validators disabled

Fixes https://github.com/vaadin/framework/issues/10709

Co-authored-by: Zhe Sun <31067185+ZheSun88@users.noreply.github.com>

Liferay 7.3 series have kernel version 10.x, i.e. limit needs to be extended from 10 -> 11

Fixes: https://github.com/vaadin/framework/issues/11938

Use 403 Forbidden instead of 410 Gone when session expired. Also prevent caching in more cases.

Fixes #11108

onConnect was allways called with websocket = false. I think this is wrong, since if there was connection loss in websocket, now connection cannot be re-established in websocket mode.

Fixes: https://github.com/vaadin/framework/issues/11299

This bug may have been manifesting in other ways as well

Recently similar fix was done in Flow as well, see: https://github.com/vaadin/flow/pull/7489

Vaadin is not affected by CVE-2014-3558, the purpose of the update is avoid false positive alarm.

Fixes: https://github.com/vaadin/framework/issues/11903

Should use a StringBuilder to accumulate strings in a loop, to avoid the performance cost of repeatedly constructing strings.

Browsers differ in what they return as the content of a visually empty rich text area (RTA). Accordingly, RTA sanitizes these different values ensuring an empty string is returned to the framework. However, existing sanitization criteria doesn't work for Firefox 74 and Internet Explorer 11.

This fix appends the sanitization criteria of Firefox 74 and IE 11, ensuring an empty string is returned to the framework for a a visually empty RTA.

Closes #10338

Fixes #11810

Fixes #10419

Fixes #11806

Fixes #10420

Column widths shouldn't be calculated between the clearing of cache and
re-populating it, but be delayed until the cache has some content again.
The calculations should only be triggered immediately if no rows are
expected.

Fixes #9996

* Updated LayoutTester screenshots for IE and FF.

* Fix an issue with frozen column count and unhiding.

Unhiding logic should take into account that there can be hidden frozen
columns that are not the column currently getting shown.

Fixes #11909

There is no need to reset the sidebar for every column that is set
hidable within the same roundtrip. Because no other layouting depends on
the sidebar contents, we can safely delay the reset until all columns
have got their hidabiity status updated. As a bonus point, when the
reset itself is delayed, the headers have time to get populated and the
sidebar button's height can be determined immediately at attach. The
reset ensures that attach is called every time a column's hidability is
changed.