Placeholder support

I've started using MythicHUD for my quest plugin's dialogue windows. Each time a dialogue window opens, it also displays the NPC's portrait. To display the correct NPC portrait, I currently have to check nearly 100 conditions in almost every case. If placeholder support could be added to texture.path, I wouldn't need to create so many conditions.

Current config:

https://mclo.gs/Ah17WtE

portraits_npc:

 conditions:

 - placeholder{ph=%typewriter_mythichud_custom_p%;v=ardin} true texture typewriter/dialogues/portraits/ardin.png

 - placeholder{ph=%typewriter_mythichud_custom_p%;v=arven} true texture typewriter/dialogues/portraits/arven.png

 - placeholder{ph=%typewriter_mythichud_custom_p%;v=boran} true texture typewriter/dialogues/portraits/boran.png

 - placeholder{ph=%typewriter_mythichud_custom_p%;v=cael} true texture typewriter/dialogues/portraits/cael.png

 .....100 more

 texture:

 path: typewriter/dialogues/portraits/empty.png

Config I would like to see supported:

portraits_npc:

texture:

path: typewriter/dialogues/portraits/%typewriter_mythichud_custom_p%.png