use editor splitters as anchor for transparent progress indicator (IDEA-129962)
[^vasya]
PushDialog: ui glitch when tree in edit mode fixed.

* do not show loaded commits while tree in edit mode;
* expand only selected node (include loading icons ) and move expand logic to tree ui;
* annotations added;
Gradle: upgrade Tooling API libs up to 2.1 (gradle sources added)
IDEA-129994 Unbalanced double quote in idea.sh:155
IDEA-129994 Unbalanced double quote in idea.sh:155
Merge remote-tracking branch 'origin/master'