Small fixes

lector/__main__.py

@@ -195,6 +195,7 @@ class MainUI(QtWidgets.QMainWindow, mainwindow.Ui_MainWindow):
         # The library refresh button on the Library tab
         self.reloadLibrary.setIcon(QtGui.QIcon.fromTheme('reload'))
         self.reloadLibrary.setObjectName('reloadLibrary')
+        self.reloadLibrary.setToolTip('Scan library')
         self.reloadLibrary.setAutoRaise(True)
         self.reloadLibrary.clicked.connect(self.settingsDialog.start_library_scan)
 
@@ -364,6 +365,9 @@ class MainUI(QtWidgets.QMainWindow, mainwindow.Ui_MainWindow):
                 {'Hash': ''},
                 'LIKE')
 
+        if not all_covers_db:
+            return
+
         all_covers = {
             i[0]: i[1] for i in all_covers_db}
 

lector/widgets.py

@@ -152,8 +152,11 @@ class Tab(QtWidgets.QWidget):
             self.metadata['hash'],
             1, QtCore.Qt.MatchExactly)
 
-        self.window().lib_ref.view_model.setData(
-            matching_item[0], self.metadata['last_accessed'], QtCore.Qt.UserRole + 12)
+        try:
+            self.window().lib_ref.view_model.setData(
+                matching_item[0], self.metadata['last_accessed'], QtCore.Qt.UserRole + 12)
+        except IndexError:  # The file has been deleted
+            pass
 
     def set_scroll_value(self, switch_widgets=True, search_data=None):
         # TODO