PLT-5699 Improvements to channel switcher (#6486)

* Refactor channel switcher to not wait on server results

* Change channel switcher to quick switcher and include team switching

* Add sections, update ordering and add discoverability button

* Fix styling error

* Use CMD in text if on mac

* Clean yarn cache on every install

* Various UX updates per feedback

* Add shortcut help text for team switcher

* Couple more updates per feedback

* Some minor fixes for GM and autocomplete race

* Updating UI for channel switcher (#6504)

* Updating channel switcher button (#6506)

* Updating switcher modal on mobile (#6507)

* Removed jQuery usage

* Rename function to toggleQuickSwitchModal

webapp/sass/layout/_navigation.scss

@@ -5,6 +5,24 @@
     background: transparent;
 }
 
+.nav-tabs {
+    margin-bottom: 10px;
+
+    > li {
+        margin-right: 5px;
+
+        > a {
+            border-bottom-color: transparent !important;
+            padding: 7px 15px;
+
+            .small {
+                @include opacity(.8);
+                margin-left: 4px;
+            }
+        }
+    }
+}
+
 #navbar {
     input {
         margin: 0 5px 0 2px;