[#667] set unique id for each checkbox and linked it

added "no-css" class to overwrite the current label style

app/views/custom_fields/_form.rhtml

@@ -79,10 +79,9 @@ function toggle_custom_field_format() {
 <div class="box">
 <% case @custom_field.class.name
 when "IssueCustomField" %>
-
     <fieldset><legend><%=l(:label_tracker_plural)%></legend>
     <% for tracker in @trackers %>
-        <%= check_box_tag "custom_field[tracker_ids][]", tracker.id, (@custom_field.trackers.include? tracker) %> <%= h(tracker.name) %>
+        <%= check_box_tag "custom_field[tracker_ids][]", tracker.id, (@custom_field.trackers.include? tracker), :id => "custom_field_tracker_ids_#{tracker.id}" %><label id="no-css" for="custom_field_tracker_ids_<%=tracker.id%>"><%= h(tracker.name) %></label>
     <% end %>
 		<%= hidden_field_tag "custom_field[tracker_ids][]", '' %>
     </fieldset>

public/stylesheets/application.css

@@ -424,6 +424,13 @@ margin-left: 5px !important;
 width: auto;
 }
 
+label#no-css {
+  font-weight: inherit;
+  float:none;
+  text-align:left;
+  margin-left:0px;
+  width:auto;
+}
 input#time_entry_comments { width: 90%;}
 
 #preview fieldset {margin-top: 1em; background: url(../images/draft.png)}