modify project menu, code history/diff style

- shortened project menu icon with css instead of javascript
- split project settings submenu to partial template, changed to nav-tabs style
- width of code diff viewer and write-comment-form has modified
- enhance commit log(code history) UI
expand project menu, fix massupdate visibility and

more types added to ext2mode on code.Browser.js
Merge branch 'master' of https://github.com/nforge/hive into fix-minorcss-130710

Conflicts:
	app/views/prjmenu.scala.html
Merge pull request #318 from laziel/fix-minorcss-130710

UI 수정사항 (130710)