Position and style the channel editor correctly

Fix a bug where some channel updates would be lost
Add channel name sanitization before storing in the database

crates/theme/src/theme.rs

@@ -221,6 +221,7 @@ pub struct CollabPanel {
     #[serde(flatten)]
     pub container: ContainerStyle,
     pub log_in_button: Interactive<ContainedText>,
+    pub channel_editor: ContainerStyle,
     pub channel_hash: Icon,
     pub channel_modal: ChannelModal,
     pub user_query_editor: FieldEditor,
@@ -885,6 +886,7 @@ impl<T> Toggleable<T> {
     pub fn active_state(&self) -> &T {
         self.in_state(true)
     }
+
     pub fn inactive_state(&self) -> &T {
         self.in_state(false)
     }