reduce incremental search to search field, hit list, and keyboard

[Jimmy34742]

With the keyboard, "All/Filters" tab, filter list, and data entry field all open at the same time, I can't even see one app in the hit list on my full-size S4. I can see maybe about 50% of one app's name and about 2/3 of its icon. I'm using Kii keyboard and adding an arrows row and a suggestions row so that my keyboard's height is about 40% of my screen. Create some way of sensing the user's desire to hide the filters status to reduce all the stuff at the top to nothing but a 1-height text field for incremental search. That would leave enough room to show 4-5 hits between the keyboard and the search field.

[M66B]

My proposal is to move the filters to a popup that appears when tapping a new filter icon on the action bar (just like sort). The category selector could be visible at the top of the window all the time, with below it the search field for the application name.

@jpeg729 a pull request would be very welcome ...

[M66B]

The action bar symbols should be added to the help page.
Which apply to any long press too (currently only for selecting).

[jpeg729]

There isn't enough space on some screens for another action button. I could put it all in the sort dialog (the sort modes could be put into a spinner).

[M66B]

That's okay with me.

[M66B]

This will be improved in the next version.