Revert "ILS Tablet/Mobile Enhancements & minor fixes:"

@alextrichos The code present a few bugs:
[ ] the tool bar appears open by default
[ ] the length of the page is affected if there are tools at the the ILS level (in the tool bar)
[ ] a few class styles from app.css are not accessible (e.g., resource related ones). Or we include the app.css once more or, we include the missing styles in custom.css

Since the current code breaks the visualisation of resources, I revert the code till we fix it.