Migrate 7.7.5 branch patches to v8. (#7969)

Migrate 7.7.5 branch patches to v8. (#7969)

* Prevent adding several scrollbar handlers (#19189).

Change-Id: Ib0cc6c6835aab6d263f153362a328bcf2be7bc5c

* Prevent adding several scrollbar handlers (#19189).

* Keep expand ratio for last row/column when reducing grid layout size (#20297)

Change-Id: Iff53a803596f4fc1eae8e4bfa307b9c1f4df961a

* Fixed drag and drop failure when message dragged from email client (#20451)

When dragging message form email client on Windows, item.webkitGetAsEntry()
might return null creating NPE on the client side. Added additional checks
for this situation.

Change-Id: I569f7e6d0d7b137f24be53d1fbce384695ae8c73

* Change expected pre-release version number pattern in publish report

Change-Id: Icdacecc490d2490ea9e262f5c5736c1dece2a89d

* Mark TextField/TextArea as busy when a text change event is pending
(#20469)

Change-Id: I404985ae0be1e7dc65171b610032f8649e700f50
# Conflicts:
#	client/src/main/java/com/vaadin/client/ui/VTextField.java
#	uitest/src/main/java/com/vaadin/tests/components/textfield/TextChangeEvents.java

* Fixed touch scrolling issue in Surface and WP devices (#18737)

Fixed by using pointerevents instead of touchevents when the browser is
IE11,
or Edge. Also added touch-action: none; css rules into escalator.css to
prevent
default touch behaviour on IE11 and Edge. Does not affect IE8 to IE10
browsers,
behaviour on those will stay the same as before the fix.

No new unit tests since we do not have automatic touch testing
possibilities yet.
Please test manually with Surface: IE11 and Edge, use for example
uitest:
com.vaadin.tests.components.grid.basics.GridBasicsomponents.grid.basics.GridBasics

Change-Id: Iddbf1852e6ffafc855f749d6f4ebb235ed0f5703

* Add lazy/simple resize mode to Grid (#20108)

Change-Id: I47427efc28c350382dba8c1f50fd332a3f4585e4

# Conflicts:
#	client/src/main/java/com/vaadin/client/connectors/GridConnector.java
#	client/src/main/java/com/vaadin/client/widgets/Grid.java
#	server/src/main/java/com/vaadin/ui/Grid.java
#	shared/src/main/java/com/vaadin/shared/ui/grid/GridState.java
#	themes/src/main/themes/VAADIN/themes/base/grid/grid.scss
#	uitest/src/main/java/com/vaadin/tests/components/grid/basicfeatures/GridBasicFeatures.java

Change-Id: Ieca56121875198ed559a41c143b28926e2695433

* Fix NPE in case some items don't contain all properties of Grid.
This could occur in when parent is a different entity than its children
in hierarchical data.

Change-Id: Icd53b5b5e5544a3680d0cd99702ab78224b2dc08

# Conflicts:
#	server/src/main/java/com/vaadin/data/fieldgroup/FieldGroup.java
#	server/src/main/java/com/vaadin/ui/Grid.java

* Mark TextField/TextArea as busy when a text change event is pending
(#20469)

Change-Id: I404985ae0be1e7dc65171b610032f8649e700f50
# Conflicts:
#	client/src/main/java/com/vaadin/client/ui/VTextField.java
#	uitest/src/test/java/com/vaadin/tests/components/textfield/TextChangeEventsTest.java

* Add lazy/simple resize mode to Grid (#20108)

Change-Id: I47427efc28c350382dba8c1f50fd332a3f4585e4

* Removed V8 VTextField unused import, forgotten @RunLocally.

* Don't rely on selenium "sendKeys" behavior.

* Revert "Change expected pre-release version number pattern in publish report"

This reverts commit 8df27b952dddb691aead6a633c5b3724c98bf343.

* Migrate TextField/TextArea patch from 7.7 to master (modern components)

Mark TextField/TextArea as busy when a text change event is pending
(#20469)

Change-Id: I404985ae0be1e7dc65171b610032f8649e700f50