Feature request: Fixed Width Icons

[Nfinished]

Potential use case: toggling between fa-caret-right and fa-caret-down when using iconize:IconLabel on accordion style lists, prevents neighboring title from jumping.

[Nfinished]

For anyone who finds this via Google while looking for a solution: Just use iconize:IconImage for now. I've found that setting IconSize two points above the needed FontSize gives the desired effect.