Remove add content button

[islamovic]

Fixes issue #.

• This pull request follows the coding standards

This PR changes:

• remove add content button that suspend the application

[dogo]

@islamovic
Could you please give me more details about the change?

[islamovic]

@dogo This button cause a problem while sliding the navigation menu. There is a problem happens when slide the menu just a bit. the menu stops sliding and this button start to take over the main screen and add it self above all layers and the app look likes it's freezes and no response.

I think the problem will be solved if we solved the main issue when the user slide the menu just a little bit and if he release the menu should continue all the way to right or to the left but don't stop for sure.
But for now i removed this button because i don't know why we should add it.

[dogo]

hum, after some investigation and testing with the described scenario and the regular ones seems fine remove. Thanks @islamovic