fix: padding, spacing, context menu style, and settings buttons

cosmic-panel-button/src/lib.rs

@@ -123,7 +123,7 @@ impl cosmic::Application for Button {
                 ))
             )
             .align_items(iced::Alignment::Center);
-            cosmic::widget::button(content)
+            cosmic::widget::button::custom(content)
                 .padding([0, self.core.applet.suggested_padding(true)])
                 .style(cosmic::theme::Button::AppletIcon)
         }