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

* 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.

* Removed outdated spacer height update from removal process.

Fixes #11856

The checkbox for selecting all rows only selects all the rows that have
not been filtered out. Changing the filtering does not change the
selection or the checkbox state so assuming that all rows are selected
simply because the checkbox has been checked cannot work.

Fixes #11479

- Initial implementation erroneously assumed that
ScrollDestination.START would only be used for scrolling up and
ScrollDestination.END for scrolling down. That's obviously not what they
are for, otherwise everyone would be using ScrollDestination.ANY.
- Moved actual scrolling to within the helper method that originally
only calculated the new scroll position. Parent method became too long
otherwise.

Fixes #11706

* Apply offset to column index depending on presense of selection column

After testing this manually I noticed that offset correction needs to be negative

* Add the testing UI

* Recalculate the column widths before the first row is added

Fixes #11607

* Grid Editor: make Tab key skip read-only/disabled fields

Closes #11584

* Extracted DefaultEditorEventHandler.getDeltaFromKeyDownEvent() which allows for easy further Grid Editor customization

* Make DefaultEditorEventHandler.Delta public so that getDeltaFromKeyDownEvent() can be overridden

* Fixed exception in isEditable() if the widget was not a Field

* Refactored DefaultEditorEventHandler.Delta to CursorMoveDelta which expresses the intent more clearly

* Merge branch 'master' into master

* Fix grid column reordering

Fix grid column reordering when there are hidden columns and footerRow.join

* Add test

Fixes #11558

* Fix duplicate grid column visibility change event

Toggle a column visibility through UI will fire 2 event. There should be only 1.

* Add Test

* Grid editor: TAB now skips non-editable columns

Pressing TAB would shift the focus to non-editable cells when the Grid was in edit mode.
This patch makes DefaultEditorEventHandler to skip such columns.

Closes #10970

* Add tests

- limit DataCommunicator workaround from #11320 to ComboBox only
- don't reset DataCommunicator before modifying all sorting data

Fixes #11532

Fixes #11557

Add DataChangeHandler removal in v7 Grid just as in v8 Grid.
Adding tests to the fix to verify, that NPE is not thrown.

* Fix an NPE caused by the previous fix to Grid's frozen columns (#10653)

If the user managed to get two frozen column count changes into a single server round-trip before the component had been attached, the previous fix  #11346 lead to a null pointer exception since there was no diff state available.

This fix adds a null check before removing the frozen column count value from the diff state so that this will not happen.

Closes #10653

* add possibility to configure nested null behavior to Grid.Column

* added addColumn method that allows configuring the nested null handling behavior of the column

* added uitest for nested null value handling, implements #11137

* Some formatting changes

In certain cases setting the frozen columns didn't produce the expected result in the client side widget state. This happened if the frozen columns value was set to be the same it was before removeAllColumns was called.

This fix removes the frozen column value from the diff state so that the value gets properly set in the client side.

Closes #10653

* Add more context information to criteriaScript in GridDropTargetConnector

When using drag and drop in Grids and TreeGrids a criteriaScript can be specified.
However, this criteriaScript only gets an event as input parameter.
It would be helpful if the criteriaScript would get more information:
- the DropLocation
- the targetElement which is used as a base for the DropLocation

This change provides a protected method in DropTargetExtensionConnector
which decides, if the drop is allowed by the criteriaScript.
This method is overriden in GridDropTargetConnector to
provide the both parameters dropLocation and targetElement.

* add Test UI for criteriaScript with targetElement and dropLocation

* add some description for the Test UI

* Fix for setting default row height for a Grid with details row(s) open.

- Details row(s) should be taken into account when the rows are
re-positioned after getting new heights.

Fixes #11325

* Test case for removing Grid with components

* This reverts commit b2745dc14f.

Add test case to address the issue with removing gird with components;
Current situation: the grid cannot be removed and client-side throw an error. 
fixes: Revert the corresponding change, as it didn't address any issue which was fixed.

- Multiple headers shouldn't stack behind each other.
- Body rows shouldn't get stuck to default row height.
- Compatibility version's hidable row selector shouldn't try to
calculate row heights based on rows that haven't been added to DOM yet.

Fixes #7674

- More lightweight, and fixes things for any custom implementations of
Escalator as well.

Fixes #11044

Fix handler creation to happen on init

Ensure that HeaderRow is not null in Grid

Fixes #10485

Fixes #9787

Fixes #10688

Fixes #11002

This patch reverts the fix #10557 and replaces it with a
proper solution from Grid perspective.

Fixes #10987
Fixes #10985

Fixes #10699

Fixes #9477

Fixes #7527

* Fix performance issue in Grid initial render with Footer

Fixes #10146
Fixes #10543