theming: allow referring to themes by symbols
may_message? to access control messaging

We want to disable this in connecting classrooms
fix Pages::CreateController in a Me context

We're now checking for may_message? which is only defined in the me_permissions.
Merge pull request #101 from azul/feature/toggle-private-messages

Feature/toggle private messages
Transformed the searchbar which was inside nested tables in less nidified divs
fixed undefined method 'may_meesage?'
gallery display image: Separated layout from the helper and embedded in the view. Fixed image-counting and added style
little tweak to rename method to the similar method name that is called.
Merge pull request #104 from tubia/cleanup/nested-tables-in-searchbar

Modified the searchbar which was inside nested tables in less nidified divs
Merge pull request #105 from tubia/bugfix/may_message

Bugfix/may message
Cutout Tab now with default class of "tab "

This way we can concat further classes to the string without combining the classes.

fixes #4408
Merge pull request #107 from tubia/bugfix/4409-gallery-photo-counting

Fixed gallery image count, added style, separated layout from helper to view