Robustness: render topicmaps w/ corrupt view props
At the moment if a topic (or assoc) lacks a required view prop, or its value has the wrong type, the entire topicmap fails to load, and can't be displayed in the Webclient. The (server-side) messages are e.g. 'dmx.topicmaps.x' property not found
or java.lang.Double cannot be cast to java.lang.Integer
.
Instead the problematic values should be automatically repaired somehow, so the topicmap is still able to be rendered.
This is a follow-up of a forum posting:
https://forum.dmx.systems/t/dmx-topicmaps-x-property-not-found/146
See also #282 (closed) (which is similar but different).
@jpn FYI