Icon fix before would create a lot of Timer threads per user, this new way assigns one thread per user connection to re-use.
Commit also contains other various code cleanup.

This adds a "Manage Server List" button  that lets users edit servers, or add servers without disconnecting from the list. This commit also includes a change to error forms so they go back to the form the user was originally on, instead of throwing the user all the way back to the main menu