Move theme.css stylesheet to light.css
* ADDED: basic outline panel
* ADDED: Vim mode(can be switched on and off in Options->Open editor
configuration file, comment '"keyMap": "sublime"' line and uncomment
'//"vimMode": true, //"keyMap": "vim",')
* FIX: theme file switching on settings.json file save
* CHANGED: do not wrap file tree context menu items