Enhancements to Navigation Bar

- User photo displayed (depending on uploading image file to upload/<userhash>). Coming next, a module for this.
- Quick Create button prettified.
- Added caret to user and quick create
- Added search box inside dropdown menu (I like it, and freed space in the navbar).
- Fixed position of elements at the right of the bar, avoiding that everything goes down if items in navbar are larger.

- NOTE: it's important to put the name of the theme as "BMyA4" instead of TemaBMyA4. Due to hardcoded refference to the theme inside its code.