Add custom switches for electron mainWindow

[eouia]

I need some custom electron switches for my purpose. (e.g., Desktop background playing)

This feature enables adding custom switches on Electron starts by a user.

You can add switches in config.js like;

electronSwitches: ['enable-transparent-visuals'],

[codecov-commenter]

Codecov Report

Merging #2643 (45529f7) into develop (8589d9c) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #2643      +/-   ##
===========================================
+ Coverage    71.01%   71.04%   +0.03%     
===========================================
  Files           16       16              
  Lines          828      829       +1     
===========================================
+ Hits           588      589       +1     
  Misses         240      240              

Impacted Files	Coverage Δ
js/electron.js	72.72% <100.00%> (+0.50%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8589d9c...45529f7. Read the comment docs.

[MichMich]

What's the difference between this and the already implemented electronOptions config option?

[eouia]

@MichMich
This is not about electronOption. It is about switch.
With electronOption (https://www.electronjs.org/docs/latest/api/browser-window#new-browserwindowoptions), you can control the window created by electron, but not the electron app itself.
switch (commandLine.switch) is rather for App(and some node features) itself. (https://www.electronjs.org/docs/latest/api/command-line-switches) These could not be achieved with electronOption

[MichMich]

Ok. If you can fix the conflict so I can merge it. Also, please create a PR in the docs repo (and if possible reference the PR in this PR).

Thanks!

[eouia]

Thanks. I'll do it in a few hours.
Anyway, with this feature, your MM could be located as Desktop wallpaper on the Mac or Linux machine. (That's my purpose of this PR. :D )

[MichMich]

Cool! Thanks for your PR!