Meta+MenuApplets: Make clang-format-10 clean

Author: https://github.com/BenWiederhake
Commit: https://github.com/SerenityOS/serenity/commit/42dd0675c0e
Pull-request: https://github.com/SerenityOS/serenity/pull/3541
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/linusg

MenuApplets/ClipboardHistory/ClipboardHistoryModel.h

@@ -56,4 +56,3 @@ private:
     Vector<GUI::Clipboard::DataAndType> m_history_items;
     size_t m_history_limit { 20 };
 };
-

MenuApplets/ClipboardHistory/main.cpp

@@ -79,7 +79,7 @@ int main(int argc, char* argv[])
     auto& icon = applet_window->set_main_widget<GUI::ImageWidget>();
     icon.load_from_file("/res/icons/16x16/clipboard.png");
     icon.set_fill_with_background_color(true);
-    icon.on_click = [& main_window = *main_window] {
+    icon.on_click = [&main_window = *main_window] {
         main_window.show();
     };
     applet_window->resize(16, 16);

MenuApplets/UserName/main.cpp

@@ -41,7 +41,7 @@ public:
         m_username_width = Gfx::Font::default_bold_font().width(m_username);
     }
 
-    virtual ~UserNameWidget() override {}
+    virtual ~UserNameWidget() override { }
 
     int get_width()
     {