Revert "Doesn't seem necessary to build fonts.css"

Actually, it's used for rendering a MUC inside a webcomponent!

Makefile

@@ -133,7 +133,7 @@ dev: stamp-bundler stamp-npm
 ## Builds
 
 .PHONY: css
-css: dev sass/*.scss css/converse.css css/converse.min.css css/theme.min.css css/inverse.css css/inverse.min.css
+css: dev sass/*.scss css/converse.css css/converse.min.css css/theme.min.css css/inverse.css css/inverse.min.css css/fonts.css
 
 css/inverse.css:: dev sass sass
 	$(SASS) -I $(BOURBON) -I $(BOOTSTRAP) sass/inverse/inverse.scss css/inverse.css
@@ -141,6 +141,9 @@ css/inverse.css:: dev sass sass
 css/converse.css:: dev sass
 	$(SASS) -I $(BOURBON) -I $(BOOTSTRAP) sass/converse/converse.scss css/converse.css
 
+css/fonts.css:: dev sass
+	$(SASS) -I $(BOURBON) -I $(BOOTSTRAP) sass/font-awesome.scss $@
+
 css/%.min.css:: css/%.css
 	make dev
 	$(CLEANCSS) $< > $@

sass/inverse/inverse.scss

@@ -36,6 +36,7 @@
     @import "bootstrap/scss/popover";
     @import "bootstrap/scss/utilities";
 }
+@import "../fonts";
 @import "../core";
 @import "core";
 @import "../profile";

sass/only-fonts.scss

-@import "bourbon";
-@import "converse/variables";
-@import "fonts";