Zoom Tracks N Rows - Possible to avoid dialog box?

Actual you can create your own KC for whatever track height you would like with a combination of Macros and PLE. It’s a pain to set up but awesome once done.

e.g. Use KC -Zoom Tracks 4 rows- and then increase/decrease height with Zoom out/in tracks commands.
Create a PLE that selects all tracks and then executes your macro.

You should be able to accomplish this and have your own custom track height macro.