JS - Fix setting a color on an annotation

- strokeColor corresponds to borderColor;
 - support fillColor and textColor;
 - support colors on the different annotations;
 - fix typo in aforms (+test).

src/scripting_api/aform.js

@@ -529,7 +529,7 @@ class AForm {
         event.rc = false;
         return;
       }
-      event.value += cMask.subString(value.length);
+      event.value += cMask.substring(value.length);
       return;
     }