CSS: properly align section heading and its actions

css/converse.css

@@ -10805,6 +10805,7 @@ body.reset {
     padding: 0;
     margin: var(--controlbox-heading-top-margin) 0 0.5em 0;
     font-size: 1.1em;
+    line-height: 1.1em;
     text-transform: uppercase; }
   #conversejs #controlbox .controlbox-section .controlbox-heading--groupchats {
     color: var(--chatroom-head-color); }

sass/_controlbox.scss

@@ -228,6 +228,7 @@
                 padding: 0;
                 margin: var(--controlbox-heading-top-margin) 0 0.5em 0;
                 font-size: 1.1em;
+                line-height: 1.1em;
                 text-transform: uppercase;
             }