Clear selection, context and rename for deleted files.

Fix for #9214.
Clear file tree context when context menu item is selected.

This is a fix for #9228.
Fix click handling for file tree rename inputs.

Fix for #9217.
context mouse down was blocking clicks on the rename input.
Add missing space in classes on file node.

Fix for #9264.
Make sure context bar is positioned properly when focused on working set.
Replace magic number 2 with a MIDDLE_MOUSE_BUTTON constant
Fix a case in which an expanded subdirectory causes parent from loading fully.
Save tree state when folders are toggled via toggleSubdirectories and closeSubtree.

Fix for #9269.
Save tree state via show in file tree.

Fix for #9276.
Merge remote-tracking branch 'upstream/master'
Fix rename via slow click to display errors as it does for the menu.
-merged master
Make the errors from renameItemInline more informative.
Switch to using display:none rather that moving the box.
Merge branch 'master' into dangoor/9214-wrong-file

Conflicts:
	test/spec/ProjectModel-test.js
Adds the shadow to project-files-container.

Fix for #9251.
`.then` for toggleSubdirectories should saveTreeState at the correct time.
Merge pull request #9287 from adobe/dangoor/expand-collapse

File tree expand/collapse tree state fixes
Merge pull request #9265 from adobe/dangoor/rename-issues

File tree rename issues fix, part 1