Position setting should work all the time now

Learn not to swear so much at the screen
Cover icons in the tab bar
Shift Scan Library button from the Library tab to the Library toolbar

lector/toolbars.py

@@ -376,6 +376,11 @@ class LibraryToolBar(QtWidgets.QToolBar):
             self)
         self.tableViewButton.setCheckable(True)
 
+        self.reloadLibraryButton = QtWidgets.QAction(
+            image_factory.get_image('reload'),
+            self._translate('LibraryToolBar', 'Scan Library'),
+            self)
+
         self.libraryFilterButton = QtWidgets.QToolButton(self)
         self.libraryFilterButton.setIcon(image_factory.get_image('view-readermode'))
         self.libraryFilterButton.setText(
@@ -396,6 +401,7 @@ class LibraryToolBar(QtWidgets.QToolBar):
         self.addAction(self.coverViewButton)
         self.addAction(self.tableViewButton)
         self.addSeparator()
+        self.addAction(self.reloadLibraryButton)
         self.addWidget(self.libraryFilterButton)
         self.addSeparator()
         self.addAction(self.colorButton)