fix: tune sidebar and context panel sizing

Keep the left sidebar open when the context panel opens
Reduce right sidebar and context panel default widths
Collapse only the sync button label at medium widths

packages/ui/src/index.css

@@ -760,6 +760,12 @@ html:not(.dark) .chat-scroll {
   }
 }
 
+@container commit-actions (max-width: 22rem) {
+  .commit-actions__label--push {
+    display: none;
+  }
+}
+
 @container commit-actions (max-width: 19rem) {
   .commit-actions__label {
     display: none;