Tab customization & direct messages tab (#1012)

* custom tabs

* custom tabs interface

* implement custom tab functionality

* add database migration

* fix bugs, improve ThemeUtils nullability handling

* implement conversationsfragment

* setup ConversationViewHolder

* implement favs

* add button functionality

* revert 10.json

* revert item_status_notification.xml

* implement more menu, replying, fix stuff, clean up

* fix tests

* fix bug with expanding statuses

* min and max number of tabs

* settings support, fix bugs

* database migration

* fix scrolling to top after refresh

* fix                                 bugs

* fix warning in item_conversation

app/src/main/java/com/keylesspalace/tusky/di/ActivitiesModule.kt

@@ -86,4 +86,7 @@ abstract class ActivitiesModule {
     @ContributesAndroidInjector
     abstract fun contributesLicenseActivity(): LicenseActivity
 
+    @ContributesAndroidInjector
+    abstract fun contributesTabPreferenceActivity(): TabPreferenceActivity
+
 }