Draft: Reporting Flow Redesign

It looks like Dr. Konqi is going back to school, for UX! To congratulate her on her accomplishments, we're giving her favorite tool a much needed makeover in preparation for all of the Plasma 6 bugs (or the lack thereof 😉)

This also fixes a few issues:

• The margins on pages are non-existent (BUG: 467576 and !76)
• The wizard flow needs work, and some of the validation is broken.
• Backtrace view is buggy when loading, and the height is wrong.
• The UI just looks "old" and out of place compared to our recent Kirigami stuff.

This is currently a work in progress, so I'm open for suggestions or improvements. Here is some of the improvements already made:

Before	After

Before	After

Current workboard:

• Re-implement back buttons for the advanced backtrace pages.
• Add back scrolling for the backtrace.
• Add new strings for the more barren pages which are now filled with inline messages.
• Tweak the initial window size because it's now a little too small.
• Figure out a better layout for the "basic" backtrace page.
• Rework or remove the header information, or maybe just hide it for the basic view.
• Left-align the form labels