Add lock and group icon to scene tree editor
Fix crash in editor when open new scene in editing

resources_dock->cleanup(); // This will delete GDScript instance (if property_editor->obj is scene's GDScript instance, editor will crash)
Merge pull request #381 from marynate/PR-scene-tree-icons

Add lock and group icon to scene tree editor
Merge pull request #383 from sanikoyes/hotfix-Crash-In-Editor

Fix crash in editor when open new scene in editing
Make visibility icon always last to display in scene tree
Merge pull request #386 from marynate/PR-scene-tree-align-eye-icon

Make visibility icon always last to display in scene tree
Shift+Del to delete nodes without confirmation
Change key move behavior of canvas item editor to ignore zoom level; Add
alt + arrow key as local base move mode; Control + arrow key as local +
rotation move mode
Fix LineEdit selected text drag and drop behavior: move instead of duplicate selected text; maintain selection after drag and drop.
Merge pull request #397 from marynate/PR-line-edit-drag-n-drop

Fix LineEdit selected text drag and drop behavior
Merge pull request #393 from marynate/PR-2d-key-move

Tune 2d editor arrow key move mode
Merge pull request #392 from marynate/PR-delete-without-confirm

Shift+Del to delete nodes without confirmation
Make String::right count from pos instead of pos+1
Merge pull request #408 from marynate/PR-string-right

Make String::right count from pos instead of pos+1
User can use '.METHOD' or 'METHOD(' to seach exact method in Search Classes dialog
Merge pull request #409 from marynate/PR-help-seach-exact-method

Use simple pattern '.METHOD' or 'METHOD(' to search method in Search Class Dialog
Merge remote-tracking branch 'upstream/master'