mutable menu item text for 'Toggle page overlap'

frontend/ui/reader/readerpaging.lua

@@ -145,7 +145,11 @@ end
 function ReaderPaging:addToMainMenu(tab_item_table)
 	if self.ui.document.info.has_pages then
 		table.insert(tab_item_table.typeset, {
-			text = _("Toggle page overlap"),
+			text_func = function() 
+				return self.show_overlap_enable and 
+				_("Turn off page overlap") or 
+				_("Turn on page overlap")
+			end,
 			callback = function()
 				self.show_overlap_enable = not self.show_overlap_enable
 			end

frontend/ui/widget/touchmenu.lua

@@ -49,7 +49,7 @@ function TouchMenuItem:init()
 			align = "center",
 			HorizontalSpan:new{ width = 10 },
 			TextWidget:new{
-				text = self.item.text,
+				text = self.item.text or self.item.text_func(),
 				face = self.face,
 			},
 		},