[Request] Add "Tree Feeds" to "Show/Hide" menu option list

[dooafus]

Hello! Please add Tree Feeds to the View > Show/Hide menu selection. Currently, Tree Feeds can only be enabled/disabled by pressing CTRL+D keyboard shortcut.

One day, I opened QuiteRSS reader and could not find out where the tree selection went, and thought maybe the application was corrupted because everything was visible in the Show/Hide menu. After some googling I found this thread explaining the shortcut: https://quiterss.org/en/forums/questions/consolidated-view-all-feeds

Thanks for the great reader!