clean up modals.less comments, add new class for optional use on modal forms...

clean up modals.less comments, add new class for optional use on modal forms to remove bottom margin

docs/assets/css/bootstrap.css

@@ -2888,6 +2888,9 @@ button.btn.small, input[type="submit"].btn.small {
 .modal-body {
   padding: 15px;
 }
+.modal-body .modal-form {
+  margin-bottom: 0;
+}
 .modal-footer {
   padding: 14px 15px 15px;
   margin-bottom: 0;

less/modals.less

 // MODALS
 // ------
 
+// Recalculate z-index where appropriate
 .modal-open {
   .dropdown-menu {  z-index: @zindexDropdown + @zindexModal; }
   .dropdown.open { *z-index: @zindexDropdown + @zindexModal; }
@@ -8,6 +9,7 @@
   .tooltip       {  z-index: @zindexTooltip  + @zindexModal; }
 }
 
+// Background
 .modal-backdrop {
   position: fixed;
   top: 0;
@@ -25,6 +27,7 @@
   .opacity(80);
 }
 
+// Base modal
 .modal {
   position: fixed;
   top: 50%;
@@ -53,9 +56,17 @@
   // Close icon
   .close { margin-top: 2px; }
 }
+
+// Body (where all modal content resises)
 .modal-body {
   padding: 15px;
 }
+// Remove bottom margin if need be
+.modal-body .modal-form {
+  margin-bottom: 0;
+}
+
+// Footer (for actions)
 .modal-footer {
   padding: 14px 15px 15px;
   margin-bottom: 0;