fix z-buffer issues on x11/mesa
Merge pull request #371 from SystemFail/master

fix z-buffer issues on x11/mesa
Start working on script editor help
Add get_word_under_cursor() method to TextEdit
EditorNode consume F1 key only when Shift or Command key not pressed at the same time
Update EditorHelp to response help request other than class; Make sure EditorHelpSearch dialog popup with search results
Implement Shift+F1 as contextual help hotkey for script editor; There's
one bug that when jump to help tab first time, the scroll position is
wrong.
Merge pull request #373 from marynate/PR-contextual-help

Contextual help for Script Editor
Add auto code completion (without press Ctrl+Space manually)

Disalbe auto code completion even there's only one option

Hide auto-completion if only one completion option and it's been typed

Support use tab key to accept code completion option
Press F key in 2d editor to center view to selected node

Press Ctrl+F to frame selected nodes in 2d editor

Change Frame Selection hotkey in 2d editor from Ctrl to CMD for Mac compatability
Merge pull request #374 from marynate/PR-code-complete

Add auto code completion (without press Ctrl+Space manually)
Merge pull request #375 from marynate/PR-2d-editor-F-key

Add F and CMD+F hot key for center/frame selected node(s) in 2d editor