fix wrong xpointer when changing screen orientation

frontend/ui/data/creoptions.lua

@@ -27,7 +27,7 @@ local CreOptions = {
 				args = {"portrait", "landscape"},
 				default_arg = "portrait",
 				current_func = function() return Screen:getScreenMode() end,
-				event = "SetScreenMode",
+				event = "ChangeScreenMode",
 			}
 		}
 	},

frontend/ui/reader/readerrolling.lua

@@ -321,6 +321,11 @@ function ReaderRolling:onSetDimensions()
 	end
 end
 
+function ReaderRolling:onChangeScreenMode(mode)
+	self.ui:handleEvent(Event:new("SetScreenMode", mode))
+	self:onChangeViewMode()
+end
+
 --[[
 	PosUpdate event is used to signal other widgets that pos has been changed.
 --]]