Rename the 'temp' form.

The ctl+f 'temp' window is clearly not that temporary - if contains things like georeferencing imagery and GPS injection which are pretty standard functions for plenty of use cases.

Can we rename this to something tidier, like "Advanced Functions", and provide some alternative method of getting to it than an totally non-obvious keyboard combination?

I think we already did this as a side effect of one of our theming related pull requests, but @meee1 cut it when merging, so I assume there was some objection?

The issue identifies the ctl+f “temp” window and mentions a theming-related pull request, but it names no files or tests. Locate the window and review the related theming change and comment history first. Done means the window has a clearer name and a discoverable way to open it without the non-obvious keyboard combination.

Written by the indexing model from the issue text.