fixed bugs in tags editing

src/lib/strformat.js

@@ -50,6 +50,10 @@ function stringToColorHash(value) {
 }
 
 // Converts user or topic ID to a CSS color class. Ideally it should produce the same color value as Java version.
-export function idToColorClass(string, light) {
-  return (light ? 'light-color' : 'dark-color') + (Math.abs(stringToColorHash(string)) % 16);
+// params:
+// - {string} id: user or topic ID
+// - {boolean} light: light or dark version of the color.
+// - {boolean} fg: foreground or background color.
+export function idToColorClass(id, light, fg) {
+  return (light ? 'lt-' : 'dk-') + (fg ? 'fg-' : 'bg-') + (Math.abs(stringToColorHash(id)) % 16);
 }