fix: re-introducing indeterminate checkbox state to ACP privs

public/language/en-GB/admin/manage/categories.json

@@ -29,7 +29,7 @@
 	"select-category": "Select Category",
 	"set-parent-category": "Set Parent Category",
 
-	"privileges.description": "You can configure the access control privileges for this category in this section. Privileges can be granted on a per-user or a per-group basis. Select the domain of effect from the dropdown below.",
+	"privileges.description": "You can configure the access control privileges for portions of the site in this section. Privileges can be granted on a per-user or a per-group basis. Select the domain of effect from the dropdown below.",
 	"privileges.category-selector": "Configuring privileges for ",
 	"privileges.warning": "<strong>Note</strong>: Privilege settings take effect immediately. It is not necessary to save the category after adjusting these settings.",
 	"privileges.section-viewing": "Viewing Privileges",

public/less/admin/paper/bootswatch.less

@@ -328,6 +328,22 @@ input[type="checkbox"],
     .transition(240ms);
   }
 
+  &:indeterminate:before {
+    content: "";
+    position: absolute;
+    top: 6px;
+    left: 6px;
+    display: table;
+    width: 6px;
+    height: 12px;
+    border-top: 2px solid #fff;
+  }
+
+  &:indeterminate:after {
+    background-color: @brand-primary;
+    border-color: @brand-primary;
+  }
+
   &:checked:before {
     content: "";
     position: absolute;

public/src/admin/manage/privileges.js

@@ -85,7 +85,7 @@ define('admin/manage/privileges', [
 			}
 		});
 		for (var x = 0, numPrivs = privs.length; x < numPrivs; x += 1) {
-			var inputs = $('.privilege-table tr[data-group-name]:not([data-group-name="registered-users"],[data-group-name="guests"]) td[data-privilege="' + privs[x] + '"] input');
+			var inputs = $('.privilege-table tr[data-group-name]:not([data-group-name="registered-users"],[data-group-name="guests"],[data-group-name="spiders"]) td[data-privilege="' + privs[x] + '"] input');
 			inputs.each(function (idx, el) {
 				if (!el.checked) {
 					el.indeterminate = true;