Merge pull request #1 from NamelessCoder/proposals

[TASK] Various proposals from the nameless one

Kodus to @NamelessCoder (https://github.com/NamelessCoder/TYPO3.CMS.Flat/)
[FEATURE] Bring FontAwsome *fa*
[BUGFIX] Folder tree link color
[TASK] Collapsed ExtJS color
[FEATURE] FormEngine: Increase section-header font size
[TASK] DocHeader spacings left+right must be equal to editing area
[FEATURE] Flat spinner
Merge pull request #2 from NamelessCoder/proposals

[TASK] Hover effects & file list positioning