feat(maxlength): add styles to chars-left div

discuss_data/static/sass/custom_bootstrap_vars.scss

@@ -30,6 +30,7 @@ $theme-colors:
   "border-gray": $light-gray,
   "image-overlay": $transparent-grey,
   "transparent-light":$transparent-white,
+  "hint": $transparent-grey,
 );
 
 $font-size-base: 0.8rem;

discuss_data/static/sass/project.scss

@@ -31,7 +31,12 @@ body {
   padding-left: 0;
 }
 
-
+.chars-left {
+  color: theme-color("hint");
+  padding-top: .3rem;
+  float:right;
+  font-size: smaller;
+}
 
 .list-group-item {
   user-select: none;