FM: rotation flush setting before reinit (#6532)

when rotation was caused by a gesture the gesture settings were not flushed leading to weird state when the FM reinit reloaded the gestures plugin

discovered in #6530 caused by #6309

frontend/apps/filemanager/filemanager.lua

@@ -643,6 +643,7 @@ function FileManager:tapPlus()
 end
 
 function FileManager:reinit(path, focused_file)
+    UIManager:flushSettings()
     self.dimen = Screen:getSize()
     -- backup the root path and path items
     self.root_path = path or self.file_chooser.path