UI adjustments

Includes fixes:

(79964984) Newsletter sign-up notice
(69913722, 75095452) Allowing description to overflow, removing scrollbars. Also, allowing wo...
(77306458) Adjusting spacing for Subkast headers
(80069244) Setting max size for event images on main screen and detail screen
We can't accept this pull request because you've re-written the entire SCSS file.  We use two spaces no tabs for the SCSS.

You will need to put the files back in their original state before we can accept the request.