Replace "Give Feedback" with an icon and move it to the left

This is so we can show the current language in the status bar on
the right, and having two pieces of text sitting next to each other
felt too busy.

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

crates/theme/src/theme.rs

@@ -280,7 +280,7 @@ pub struct StatusBar {
     pub auto_update_progress_message: TextStyle,
     pub auto_update_done_message: TextStyle,
     pub lsp_status: Interactive<StatusBarLspStatus>,
-    pub feedback: Interactive<TextStyle>,
+    pub feedback: Interactive<IconButton>,
     pub sidebar_buttons: StatusBarSidebarButtons,
     pub diagnostic_summary: Interactive<StatusBarDiagnosticSummary>,
     pub diagnostic_message: Interactive<ContainedText>,