The problem:

Find usages shows the line on which the item is used, this can become a performance issue for css class lookups (from sass files).

The class is found multiple times on line 1 of style.min.css (which is what you want, but)
The entire 50KB line is shown multiple times in in the find uses window, which causes tremendous lag in the interface.


Proposed solution:

Also show the column number (Example: 1:123 for line 1 character 123) and when the line is longer than 200 chars only show a small portion of the line. 


Could be related to #237759