Patch Tkinter UI Issues

[Felix-Mallinder]

Description:

Since deploying the tkinter UIs amongst other toolkits, there has found to be a couple of performance issues which need patched. eg:

• widgets get logged between runs, and not properly cleared, causing error trying to pack a widget of a dead root
• logo package import can fail when the previous window has ended with exception
• Path to the relative .tcl files was never updated after creation of the theming package

How to replicate:

Expected behaviour:

Test file(s):