Release v4.2.4 · vaadin/vaadin-combo-box

aaa53b1 Revert "Close the overlay if size is 0 after data provider callback (#752)" (#773)

This reverts commit 6a94726.
28dfc8b Don't request empty loaded page again (#772)

Previously, combobox didn't request a page again if it was already
loaded, but this logic did not apply if the returned array was empty.

This caused a bug in the Flow component, as the Flow dataprovider
doesn't return the empty array again after it has already given this
data to the client. This left the combobox hanging in loading state.

Flow component issue:
vaadin/vaadin-combo-box-flow#178
adfe7b7 fix: use only root level template as the item template (#768)
9b58f49 Remove extra filteredItems when size decreases (#771)

This is a fix for a bug found in the Flow component:
vaadin/vaadin-combo-box-flow#177

Clearing the cache and returning less items than previously from the
dataProvider resulted in extra placeholder items.
ebd8f9a Fix visual tests: update screenshot for Firefox (#770)
ae2b3a1 chore: remove analysis.json [skip ci]

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