#showtooltip conditional icon support

I have the following Action Block:

/cast Berserker Stance
/cast Berserker Rage

GSE will set the macro icon to Berserker Stance, but I want it to show Berserker Rage instead. Using a regular macro I would simply add #showtooltip Berserker Rage to the top, but GSE doesn’t support showtooltip. Is there any way in GSE that I can accomplish this?

Change the macro icon from the default WoW UI

This is not the only action block I have. If I change the macro icon in the default WoW UI then the icon won’t change when sequencing through other blocks right?