cleanup
fix border in dbe table editors
Merge remote-tracking branch 'origin/master'
Platform: OS X scrollbars can be disabled for diagnostic purpose
Platform: IDEA-125330 Warning about non-project file modification should be merged with Read-only warning and shown in a modal dialog
Local History tests tuned for new VFS behavior
DebugLogConfigureAction: define the default focused component
[git] cleanup
[vcs] Log executable validation failure reason
optimize ImmutableText memory usage

* nodes shouldn't contain null fields
* chunk into small fragments only when document modifications are made
a less gc-producing ImmutableText.subtext
do not visit additional resource roots twice: additional indexed resource root providers can return intersecting paths sometimes