changed default tab to name
sorting direction icon is only displayed in active tab
added functional rating apps list to installed apps activity
started implementation of swipeable tabs
successfully implemented swiping on installed apps list but lost sorting capabilities
finished implementation of tab swiping and modified navigation hirarchie of all apps
finished the sorting by swiping and showing the correct icons
Merge branch 'feature/InstalledApps' into develop
Merge branch 'develop' into feature/RateApp