Fix a bunch of other low-hanging style lints (#36498)

- **Fix a bunch of low hanging style lints like unnecessary-return**
- **Fix single worktree violation**
- **And the rest**

Release Notes:

- N/A

crates/collab_ui/src/chat_panel.rs

@@ -890,7 +890,7 @@ impl ChatPanel {
                         this.highlighted_message = Some((highlight_message_id, task));
                     }
 
-                    if this.active_chat.as_ref().map_or(false, |(c, _)| *c == chat) {
+                    if this.active_chat.as_ref().is_some_and(|(c, _)| *c == chat) {
                         this.message_list.scroll_to(ListOffset {
                             item_ix,
                             offset_in_item: px(0.0),
@@ -1186,7 +1186,7 @@ impl Panel for ChatPanel {
                 let is_in_call = ActiveCall::global(cx)
                     .read(cx)
                     .room()
-                    .map_or(false, |room| room.read(cx).contains_guests());
+                    .is_some_and(|room| room.read(cx).contains_guests());
 
                 self.active || is_in_call
             }

crates/collab_ui/src/collab_panel.rs

@@ -664,9 +664,7 @@ impl CollabPanel {
 
                 let has_children = channel_store
                     .channel_at_index(mat.candidate_id + 1)
-                    .map_or(false, |next_channel| {
-                        next_channel.parent_path.ends_with(&[channel.id])
-                    });
+                    .is_some_and(|next_channel| next_channel.parent_path.ends_with(&[channel.id]));
 
                 match &self.channel_editing_state {
                     Some(ChannelEditingState::Create {
@@ -1125,7 +1123,7 @@ impl CollabPanel {
     }
 
     fn has_subchannels(&self, ix: usize) -> bool {
-        self.entries.get(ix).map_or(false, |entry| {
+        self.entries.get(ix).is_some_and(|entry| {
             if let ListEntry::Channel { has_children, .. } = entry {
                 *has_children
             } else {

crates/collab_ui/src/notification_panel.rs

@@ -497,7 +497,7 @@ impl NotificationPanel {
                 panel.is_scrolled_to_bottom()
                     && panel
                         .active_chat()
-                        .map_or(false, |chat| chat.read(cx).channel_id.0 == *channel_id)
+                        .is_some_and(|chat| chat.read(cx).channel_id.0 == *channel_id)
             } else {
                 false
             };