Fix a lot of recommendations from staticcheck #1125
Merged
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Description:
Running
staticcheck -f stylish ./...
on the codebase got a lot of result of small changes to improve the code. Some where ignored due to being part of the gomobile code, but most of the strictly fyne related fixes are fixed.Testing:
There is more testing that needs to be done on Windows and MacOS and some parts where I would like some feedback before touching it. I would have created a draft PR, but I remember seeing issues with Travis on those so I will keep it as a regular PR for now.
Please check that I haven't removed something that I shouldn't have removed.
Checklist: