Adjust icon size by height only

Author: dlmsr

styles.css

@@ -11,8 +11,8 @@
 .block_groups input.blockgroupsandgroupingcheckbox ~ label::before {
     content: url('[[pix:t/collapsed]]');
     display: inline-flex;
-    width: 16px;
-    height: 16px;
+    height: 0.9rem;
+    margin-right: 0.2rem;
 }
 
 .block_groups input.blockgroupsandgroupingcheckbox:checked ~ label::before {
@@ -47,4 +47,4 @@
 .block_groups .block-groups-warning,
 .block_groups .block-groups-spinner {
     padding-right: 6px;
-}
+}