Feature Request: ability to work with more than one file

[Esshahn]

Currently there's no easy way to incorporate data from one petmate file into another. There's no merge option.

Suggestion

• allow for multiple files to be open (or multiple instances of petmate that is)

Hack

• do not clear the brush tool data when opening a file (so we can at least use the brush as a copy & paste tool)

[nurpax]

Another workaround: export a screen and import it back into the other window.

Multiple instances: this works on Windows but not on macOS because of mac’s weirdness (sorry i just never got used to this and probably will never change my mind that it’s just a little stupid). So it’d have to be one process w/ multiple windows. Doable but requires the electron main to be rewritten to understand there are many windows.