Representing textgrid-URIs in portal URL

The Liferay portlet did not allow dots or colons in urls, so as a workaround all dots where replaced by underscores. To view the url textgrid:kv2q.0 the link is now:

https://dev.textgridrep.org/browse/kv2q_0

(In the liferay portlet it was even worse: https://dev.textgridrep.org/browse/-/browse/kv2q_0)

However, normal URIs in the url are supported again, this is resolved now: https://dev.textgridrep.org/browse/kv2q.0 and also https://dev.textgridrep.org/browse/textgrid:kv2q.0

Should we change our internal linking to contain short URIs like "kv2q.0" or long URIs like "textgrid:kv2q.0" and just keep underscore links resolvable for backwards compatibility?