anim: animate on compose button hide

before we were just nuking it

Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_columns/src/app.rs

@@ -592,7 +592,6 @@ fn hovering_post_button(
     let darkmode = ui.ctx().style().visuals.dark_mode;
 
     // only show the compose button on profile pages and on home
-    if should_show_compose {
     let compose_resp = ui.put(rect, ui::post::compose_note_button(darkmode));
     if compose_resp.hovered() {
         notedeck_ui::show_pointer(ui);
@@ -605,7 +604,6 @@ fn hovering_post_button(
             SidePanelAction::ComposeNote,
         );
     }
-    }
 }
 
 /// Should we show the compose button? When in threads we should hide it, etc