Feature/dlc dropdown relocation

[liamcannon]

Description

Moves the DLC dropdown from the Mods grid to its own group box beneath the Profile Settings

Motivation and Context

Because someone wanted it

How Has This Been Tested?

This is just a UI change, there is no risk to functionality

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.