Bug: Entity Report Key/Value Filter Lag

[Arenovas]

Describe the bug

When enabling the By key/value filter in the Entity Report window, Hammer freezes up depending on how many entities are in the map.

To Reproduce

1. Open a map with a lot of entities, such as a finished map
2. Open the Entity Report window
3. Click the By key/value button and try to interact with anything else

Issue Map

Any VMF with plenty of entities. Good examples would be decompiled maps from stock Portal 2.

Expected Behavior

For the By key/value toggle to not lock up the program for long periods. The issue doesn't seem to exist in regular Source Engine Hammer when I tested it using TF2's Hammer.

Operating System

Windows 10