UI for compile issues that don't have a line number

[qix]

If a compile error is missing a location you can't see it.

Expected behavior

Perhaps hovering over compile error should show the message in all cases

Actual behavior

Can't see it

Steps to reproduce the behavior

LET EventData := input();
LET SqrlClock := TweetDate;
LET TweetDate := SqrlClock;

Circular feature definitions don't have locations it seems.

[meyer]

ooh yeah i was wondering about this. VS Code puts errors at 0,0 if they're missing a location. we could probably mirror that behaviour.