Feature request: Choose landing page

[shawn_a]

This is already in 3.4 btw, added a few days ago.
https://github.com/GetSimpleCMS/GetSimpl...ssues/1002

however it is still a user config, a plugin would be needed to make it end user friendly, say in settings or a flag make this page index or something. Ideally index should probably be an alias to a page.