fix: Setup backup loader

[obany]

Description of change

Fixes a number of issue around profile creation, adds busy indicators where necessary and improves mnemonic validation.

Links to any relevant issues

Fixes #358 #361 #355 #305

Type of change

• Bug fix (a non-breaking change which fixes an issue)
• Enhancement (a non-breaking change which adds functionality)

How the change has been tested

Tested on windows, mac and ubuntu

Change checklist

Add an x to the boxes that are relevant to your changes, and delete any items that are not.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[cvarley100]

I can't click on duplicate words.

Also I would just label the button "reset" and only turn it blue after a word has been selected.

[obany]

Fixed, reset button label and only active after a selection. Duplicate words now allowed.