Extend external calendar import URL character allowance

[verstehbahnhof]

I am trying to create a space (Space A) that aggregates various calendars (from various sources, but for example also from within the same humhub instance, for example from Space B) into an overview calendar as a basis for tracking activities for young people across various sports clubs, initiatives etc. I unfortunately cannot use the URL provided by exporting the calendar from Space B as an external calendar in Space A as the export URL (352 chars) exceeds the character limit for importing external calendars (256 chars).

It would be either nice to extend the character limit for external calendar URLs so I can import calendars from other HumHub spaces.

Thanks a ton,

daniel