Feature (Discussion): Set theme-color meta tag according to events

[pysysops]

Expected Behavior

Some mobile browsers support the theme-color meta tag to set the task / address bar UI colour from. This could be useful for using a mobile device as a monitoring indicator.

Current Behavior

Currently, no theme-color is set. The browser / device default is used.

Possible Solution

Create a theme-color factory or service to set the meta tag according to the current status of events. I have a proof of concept on my own Uchiwa install which results in dynamic updates according to event status:

No Issues (silenced)	Warning	Critical

Depending on how the community feels about this I'd be willing to open up a PR and improve it with help / feedback?