Fix library up button and toolbar title

app/src/main/java/dev/jdtech/jellyfin/MainActivity.kt

@@ -38,4 +38,9 @@ class MainActivity : AppCompatActivity() {
         setupActionBarWithNavController(navController, appBarConfiguration)
         navView.setupWithNavController(navController)
     }
+
+    override fun onSupportNavigateUp(): Boolean {
+        onBackPressed()
+        return true
+    }
 }

app/src/main/java/dev/jdtech/jellyfin/fragments/MediaFragment.kt

@@ -26,7 +26,8 @@ class MediaFragment : Fragment() {
             CollectionListAdapter(CollectionListAdapter.OnClickListener { library ->
                 findNavController().navigate(
                     MediaFragmentDirections.actionNavigationMediaToLibraryFragment(
-                        library.id
+                        library.id,
+                        library.name
                     )
                 )
 

app/src/main/res/navigation/main_navigation.xml

@@ -29,10 +29,15 @@
     <fragment
         android:id="@+id/libraryFragment"
         android:name="dev.jdtech.jellyfin.fragments.LibraryFragment"
-        android:label="library_fragment"
+        android:label="{libraryName}"
         tools:layout="@layout/fragment_library">
         <argument
             android:name="libraryId"
             app:argType="java.util.UUID" />
+        <argument
+            android:name="libraryName"
+            android:defaultValue="Library"
+            app:argType="string"
+            app:nullable="true" />
     </fragment>
 </navigation>