Revert "Don't close nav drawer on non-checkable options"

This reverts commit 0734934.

Author: divadsn

app/src/main/java/de/codebucket/mkkm/ui/MainActivity.java

@@ -172,7 +172,7 @@ public boolean onNavigationItemSelected(MenuItem item) {
                 break;
             case R.id.nav_backup:
                 Toast.makeText(this, R.string.not_implemented, Toast.LENGTH_SHORT).show();
-                return false;
+                break;
             case R.id.nav_logout:
                 new AlertDialog.Builder(this)
                         .setTitle(R.string.dialog_logout_title)
@@ -191,7 +191,7 @@ public void onClick(DialogInterface dialog, int which) {
                             }
                         })
                         .show();
-                return false;
+                break;
         }
 
         // Change title only on checkable items