feat(settings): refine density, group detailed options and add edge maximize gestures

shell/ferese-settings/src/visuals.rs

@@ -2,6 +2,8 @@ use cosmic::Element;
 use cosmic::iced::{Color, Length};
 use cosmic::widget::icon as svg_icon;
 pub use ferese_theme::Palette;
+pub const PAGE_TITLE_SIZE: f32 = 16.;
+pub const SECTION_TITLE_SIZE: f32 = 14.;
 pub use ferese_theme::controls::{
     button_style, navigation_style, settings_input as input_style, surface,
 };
@@ -358,7 +360,7 @@ fn preview(
         .symbolic(false)
         .icon()
         .width(Length::Fill)
-        .height(Length::Fixed(132.))
+        .height(Length::Fixed(84.))
         .content_fit(cosmic::iced::ContentFit::Contain)
         .into()
 }