IDEA-CR-45908: kotlin: fix false positives for 'suspicious package-private access' inspection in object literal expressions in Kotlin

(IDEA-210216)

(cherry picked from commit cdd60556)

IDEA-210304 Unnecessary "Element should be registered" error is shown for common filetype extension classes registered for a specific filetype

(cherry picked from commit df335ed2)
IDEA-CR-45904

(cherry picked from commit 464948f6)

(cherry picked from commit dd10efd3)

Review: IDEA-CR-45219

(cherry picked from commit e6e2580d)

By setting KeyEventHandler developer should take care about closing popup in case of close request.
Other popups with KeyEventHandler are reviewed and missing myPopup.cancel added.

Review: IDEA-CR-45219

(cherry picked from commit 21c83f62)

The problem is that additional listener (that was removed with this commit)
overrides existing esc listeners of content.

Additional listener for esc is redundant because it's never get called.
`com.intellij.ui.popup.AbstractPopup#dispatchKeyEvent` prevents listeners
execution if it returns true. So, if `myCancelKeyEnabled` is `false`,
listener is not executed because of `if` condition and in case of `true`
listeners are not executed.

As long as this additional listener doesn't override existing listeners,
`hide()` function is called with `myEscListener`.

Review: IDEA-CR-45219

(cherry picked from commit f175fc8a)

The previous solution for closing heavyweight hints caused VIM-1589 issue (`esc` action was not fired
while autocompletion popup is open). This is also a root cause for IDEA-203019 and 0951ab6a as a workaround.

Extracting `if (myCancelKeyEnabled)` out of the action handler has the same functionality, but passes `esc` action
to further handlers. This solves VIM-1589 and IDEA-203019 (and 0951ab6a is no more needed).

(cherry picked from commit 0e8a63cf)

(cherry picked from commit 5c400142)

(cherry picked from commit 7228d1ff)

* improve full rescan swallowing to eliminate spawn of a new full rescan threads.
* additional project was disposed and checkCanceled checks.

(cherry picked from commit 01635fa3)

(cherry picked from commit d5e35ae8)

(cherry picked from commit dea8552a)

IDEA-CR-45815: IDEA-209206 Completion: avoid showing loading... for multiple entries in the fully resized completion list

(cherry picked from commit 99d467cb)

(cherry picked from commit 67482c4c)

(cherry picked from commit 959b9c5d)

IDEA-CR-45866: ControlFlowAnalyzer: assign initialized array elements to unknown to drop locality if necessary

Fixes IDEA-210027 Variable in dataflow remains local when used inside array initializer

(cherry picked from commit 4af91368)

(cherry picked from commit eb90b189)

(cherry picked from commit 6e2bbaed)

(cherry picked from commit 4e8befb4)

IDEA-CR-45828: IDEA-209618 NotNull annotated method might result in null inspection disappears with pure Contract annotation set.

(cherry picked from commit 90cfb469)

IDEA-CR-45827: IDEA-210123 BoxedLong.equals(BoxedInteger) is incorrectly reported as 'always true' when their unboxed value is the same

(cherry picked from commit 4ba13155)

(cherry picked from commit 126110b0)

(cherry picked from commit 3a3c369d)

(cherry picked from commit 3b1f179a)

Or otherwise it breaks this code:

  pane.setFont(myFont);
  pane.setEditorKit(UIUtil.getHTMLEditorKit());

(cherry picked from commit 45121062)

devkit: don't highlight language extensions which use common classes as errors in plugin.xml (IDEA-210145)

(cherry picked from commit 2d6fe7b7, IDEA-CR-45830)

This blocks other listeners from getting events, delaying VCS Log refresh until incoming-outgoings are handled.

(cherry picked from commit 2ae462b0)
IDEA-CR-45569

(cherry picked from commit 4afe0a58)

(cherry picked from commit 994dc37b)

(cherry picked from commit 71aa6e61)

(cherry picked from commit 05e0ee67)

(cherry picked from commit a41f4826)

This plugin update contains fixes for KT-30117, KT-29427, KT-30137, KT-9618.

(cherry picked from commit 8a0646be)

(cherry picked from commit 3d5cc0c7)