theme: fonts: make font name more explicit
theme: fonts: make font name more explicit

* ttf: use MATERIAL_ICONS_REGULAR_FNT_TTF
* woff2: use MATERIAL_ICONS_BASELINE_FONT

Signed-off-by: Ralf Zerres <a55c5beace021459791f5070a9a90148cd697b8f@networkx.de>

redox-os/orbtk