Fix bug/crash when opening contextual action bar on tablet layout where two different cab's are present.

app/src/main/java/org/transdroid/core/gui/DetailsFragment.java

@@ -485,9 +485,8 @@ public class DetailsFragment extends Fragment implements OnTrackersUpdatedListen
 					return onActionItemClicked(mode, menuItem);
 				}
 			});
-			if (contextualMenu.getMenu().size() == 0) {
-				getActivity().getMenuInflater().inflate(R.menu.fragment_details_cab_main, contextualMenu.getMenu());
-			}
+			contextualMenu.getMenu().clear();
+			getActivity().getMenuInflater().inflate(R.menu.fragment_details_cab_main, contextualMenu.getMenu());
 			Context themedContext = ((ActionBarActivity) getActivity()).getSupportActionBar().getThemedContext();
 			mode.getMenuInflater().inflate(R.menu.fragment_details_cab_secondary, menu);
 			selectionManagerMode = new SelectionManagerMode(themedContext, detailsList, R.plurals.navigation_filesselected);

app/src/main/java/org/transdroid/core/gui/TorrentsFragment.java

@@ -279,9 +279,8 @@ public class TorrentsFragment extends Fragment implements OnLabelPickedListener
 					return onActionItemClicked(mode, menuItem);
 				}
 			});
-			if (actionsMenu.getMenu().size() == 0) {
-				getActivity().getMenuInflater().inflate(R.menu.fragment_torrents_cab, actionsMenu.getMenu());
-			}
+			actionsMenu.getMenu().clear();
+			getActivity().getMenuInflater().inflate(R.menu.fragment_torrents_cab, actionsMenu.getMenu());
 			Context themedContext = ((ActionBarActivity) getActivity()).getSupportActionBar().getThemedContext();
 			selectionManagerMode = new SelectionManagerMode(themedContext, torrentsList, R.plurals.navigation_torrentsselected);
 			selectionManagerMode.onCreateActionMode(mode, menu);