fix(nav): hard-lock CTA chips at 34px for bare navbar-but markup

Live header uses .navbar-form.navbar-but without .navbar-but-cluster;
remove em padding/height:auto/min-height calc that grew chips on press
and override .but.radius padding so publish/VIP stay fixed size.

assets/css/frontend/nav/zib-navbar-core.css

@@ -293,14 +293,19 @@ badge.top,
 }
 
 .navbar-top .navbar-but .but {
-    font-size: 0.8em;
-    padding: 0.3em 1em !important;
-    margin: 0.4em;
+    font-size: 13px;
+    padding: 0 14px !important;
+    margin: 0 4px;
     display: inline-flex !important;
     align-items: center;
     justify-content: center;
-    line-height: 1.44;
+    line-height: 1;
     vertical-align: middle;
+    height: 34px;
+    min-height: 34px;
+    max-height: 34px;
+    box-sizing: border-box;
+    width: fit-content;
 }
 
 .navbar-top .navbar-but .but.hover-show {