Not returning from platform settings page

[humblehumanbeing]

Click to edit: Extension manager/template manager/Hydrogen - Default
Click Platform settings
Change (or do nothing) settings
Click Save&close or cancel
You will be redirected to Available Themes page and you will need to click "configure" again to return to the edit page.

[mahagr]

We need to do this in JS as the URL changes via ajax.

Basically we need to base64 encode relative URL starting from beginning of index.php

[w00fz]

This is now implemented.
Just a quick note, Joomla only redirects back when clicking Save & Close. If you click on Cancel it doesn't work.
Unfortunately there isn't much we can do about it as it's a Joomla behavior.