Rewrite Preferences dialog

[vkbo]

Summary:

This PR completely rewrites the Preferences dialog using new design elements and layouts. The new dialog has all settings in one long page with navigation links and a search box rather than multiple tabs.

Related Issue(s):

Closes #1603
Closes #1604

Reviewer's Checklist:

• The header of all files contain a reference to the repository license
• The overall test coverage is increased or remains the same as before
• All tests are passing
• All flake8 checks are passing and the style guide is followed
• Documentation (as docstrings) is complete and understandable
• Only files that have been actively changed are committed