Fix/cleanup

[dforsi]

This PR:

• removes some unused code:
  • plugins/feature/map/mapfmlistdialog.ui doesn't seem to be used anywhere, however it would be interesting to see it implemented
  • sdrgui/gui/rollupwidget.{cpp,h}' don't seem to be used anywhere (the class that is actually used is names RollupContents` and its files are very similar to these deleted)
  • some calls to unlock and some includes related to QMutexLocker
• fixes some typos in the swagger documentation and in a readme
• applies some changes made automatically by Qt Creator that don't seem to change the appearance of the widgets
  • fix of a class name
  • removal of unused resources
  • changes to fonts (font name, size and wieght)

I'm not able to regenerate the html2 docs maybe because the generate.sh script doesn't seem up to date because it is trying to edit .yaml files under sdrbase but there are none.

[f4exb]

@srcejon I am not sure plugins/feature/map/mapfmlistdialog.ui should be removed. Maybe you had in the plans to implement this and we should save the effort of making up the dialog (although git would still remember it)

[f4exb]

Building files from the .yaml Swagger definitions is done following these instructions: https://github.com/f4exb/sdrangel/tree/master/swagger/docker

[srcejon]

@srcejon I am not sure plugins/feature/map/mapfmlistdialog.ui should be removed. Maybe you had in the plans to implement this and we should save the effort of making up the dialog (although git would still remember it)

I was planning to import data from www.fmlist.org - but the owner of that site seems to have gone quiet, so probably wont happen. As you say, I can always dig up from git later.