webui: improve rule table css

- category radio line has line-height large enough to contain
  undo button -> content doesn't move several pixels on change
- remove vertical padding from btns in table headers to maintain
  about the same height
- remove invisible border from link buttons to have the same height
  for disabled and enabled button

Reviewed-By: Endi Sukma Dewata <edewata@redhat.com>

install/ui/ipa.css

@@ -285,8 +285,10 @@ textarea.certificate {
 /* ---- Table ---- */
 
 /* Used in association tables */
-th div[name="buttons"] .action-button {
-    margin: 0 0 0 6px;
+th div[name="buttons"] .btn-link {
+    padding-top: 0;
+    padding-bottom: 0;
+    border: 0;
 }
 
 table.scrollable thead {

install/ui/less/widgets.less

@@ -70,3 +70,11 @@
     max-height: 0;
     padding: 0;
 }
+
+// Rule Details Widget
+
+.rule-enable-radio {
+    // make some space for 'Undo' button
+    line-height: @input-height-base + 2;
+    margin-bottom: 2px;
+}

install/ui/src/freeipa/rule.js

@@ -46,7 +46,8 @@ IPA.rule_details_widget = function(spec) {
         that.enable_radio = IPA.rule_radio_widget({
             name: that.radio_name,
             options: that.options,
-            entity: that.entity
+            entity: that.entity,
+            css_class: 'rule-enable-radio'
         });
 
         that.widgets.add_widget(that.enable_radio);