Bug fix release

Changes since 0.5.7:

• Fix syntax highlighting in Monokai.
• Send Exceptions to Analytics (opt-in).
• Add Ctrl-Shift-W shortcut to close window.

0.4.46: Save the state and width of sidebar in settings.

Changes:

• Make left panel resizable.
• Remember the state of left panel.
• Report errors while saving file.
• Add an option to translate tabs to spaces.
• Underscore the matching bracket.
• Add an option to turn on/off smart indentation.
• Fix "unsaved" asterisk in the title.
• Switch from Ace to CodeMirror editor engine.

v0.4.12

Remove the icon from the app title.