Add kind column to credential list

* Populate kind column with credential_type name
* Fix replace/revert input group button sizing

awx/ui/client/lib/theme/_mixins.less

@@ -28,9 +28,8 @@
 }
 
 .at-mixin-InputButton () {
-    display: block;
     height: @at-height-button;
-    line-height: 1;
+    padding: 0 @at-padding-button-horizontal;
 
     &, &:active, &:hover, &:focus {
         color: @at-color-button-text-default;