TimelinePanel: allow the toot composer collpased

src/timelines/Home.tsx

@@ -172,6 +172,7 @@ const TimelinePanel: Component<{
                 client={props.client}
                 expanded={item.id === expandedThreadId() ? 1 : 0}
                 onExpandChange={(x) => {
+                  setTyping(false)
                   if (item.id !== expandedThreadId()) {
                     setExpandedThreadId((x) => (x ? undefined : item.id));
                   } else if (x === 2) {
@@ -423,11 +424,6 @@ const Home: ParentComponent = (props) => {
             </Toolbar>
           </AppBar>
         }
-        fab={
-          <Fab color="secondary">
-            <CreateTootIcon />
-          </Fab>
-        }
       >
         <TimeSourceProvider value={now}>
           <Show when={!!client()}>