Choose calendar color from server #776

The calendar color is initially used what is defined in the server / online resource. However, after choosing another color, it is not possible to revert back to that color.

Can the color choose get an extra function called "Server color" or "Original color" that does that. "Upstream color" (is probably too technical) and "Calendar color" (is probably confusing). See the image as a proposal.

PS Server color is defined in the iCal ICS by COLOR and and as fallback by X-APPLE-CALENDAR-COLOR This already supported by ICSx⁵ in https://github.com/bitfireAT/icsx5/blob/main/app/src/main/java/at/bitfire/icsdroid/model/Validator.kt#L61

The icon used in the mock up is https://fonts.google.com/icons?selected=Material+Symbols+Outlined:cloud_download:FILL@0;wght@300;GRAD@0;opsz@24&icon.size=24&icon.color=%23000000