feat: collab component state handling rewrite & fixes (#5046)

src/components/CollabButton.scss

@@ -18,13 +18,15 @@
       left: -5px;
     }
     min-width: 1em;
+    min-height: 1em;
+    line-height: 1;
     position: absolute;
     bottom: -5px;
     padding: 3px;
     border-radius: 50%;
     background-color: $oc-green-6;
     color: $oc-white;
-    font-size: 0.7em;
-    font-family: var(--ui-font);
+    font-size: 0.6em;
+    font-family: "Cascadia";
   }
 }

src/components/CollabButton.tsx

@@ -28,7 +28,7 @@ const CollabButton = ({
         aria-label={t("labels.liveCollaboration")}
         showAriaLabel={useDevice().isMobile}
       >
-        {collaboratorCount > 0 && (
+        {isCollaborating && (
           <div className="CollabButton-collaborators">{collaboratorCount}</div>
         )}
       </ToolButton>