Add safari support

[jensmeichler]

Is your feature request related to a problem? Please describe.
Clip#board is not a fun experience to use in safari. Selecting multiple notes using background drag is selecting text and other distracting issues prevent the joy to use the app here.

Describe the solution you'd like

• [MUST] The app should feel in the same way as using chrome when using safari.
  • Selection issue should be solved.
  • Investigation about performance issues on safari (Doesn't has to be solved in this ticket, but after investigation maybe create a follow up ticket with results of investigation)
• [NICE TO HAVE] The app should be e2e tested using safari as well as chrome (Add aa action therefore)

Describe alternatives you've considered
Giving the user somehow the message, that he should consider switching the browser or to use the desktop application, when safari is detected.

Additional context
If it is not me solving this issue, please feel free to adapt the about dialog and add yourself as a contributor there :D Feel free about the format (Make it look fancy if you want :D)