Global Search (#849)

* Global Search

* Cards are now independent of design by use of recycler.

* Added local

* Some attribute fixes + moved onclick to controller.

* Lots of improvements to code

* Reversed some stuff. Thanks API 16

* Code fixes

* Performance improvements

* Moved adapter creation to constructor

* Small changes

* Removed sources settings from settings menu. Added OnChangeListener in catalogue. Made setting icon visible if room.

* bug fix

* Code review part uno

* Code review part uno-2

* Single recycler approach

* Add last source used

* Fix scroll state and some layout issues

* Fix wrong item binding

* Use data class for items

* Calculate item position and count while binding

* Fix background color with slices

* Reuse slices. Fix card background. Flatten constraint layout

* Fix global_search scroll issue

* Store last state with global search

* Minor changes

* Remove catalogue toolbar spinner. Persist catalogue across process restarts

* Save view state of recycler views. Set toolbar title with current query

app/src/main/res/layout/library_grid_recycler.xml

@@ -3,7 +3,7 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/library_grid"
-    style="@style/Theme.Widget.GridView"
+    style="@style/Theme.Widget.GridView.Catalogue"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:columnWidth="140dp"