Clean up \OC\Util

 - Use camelCase

 - Add some phpdoc

 - Fix some indents

 - Use some more spacing
remove editor div in filelist
refactor OC.Breadcrumbs, allow injection of container to allow rendering crumbs into full screen editor
Fix some naming and spacing in lib/util.php
Merge branch 'master' into clean_up_util

Conflicts:
	lib/util.php
fixing typos
Fix some phpdoc and camelcase
fix coding style for controls bar
adjust right padding of controls bar, fix #4650
fix issues caused by introduction of sticky Apps management footer
text centered horizontally and vertically in emptycontent div
rename emptyfolder to emptycontent
remove knowledgebase calls that are no longer used in ownCloud 5/6
remove the config option that is no longer needed
remove the activity call here. it is not implemented anyways. This will be provided by Activity app in the future.
Fit filesummary for \OC\Preview's ne mimetype-icons
Merge pull request #4671 from owncloud/emptycontent

centers text message in empty-content page (files and files_trashbin apps)
Merge branch 'master' into clean_up_util

Conflicts:
	lib/base.php
IE8 fixes
Merge pull request #4674 from owncloud/fit-filepicker-new-icons

Fit filesummary for \OC\Preview's new mimetype-icons