Consolidate styles (#1116)

* Consolidate styles into a Styles class and clean up code

* Format

* Add style_bg_dark_grey for nav bar

* Fix bugs found in PR

* Rename styles

* Add bg_white style

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Co-authored-by: kallanreed <kallanreed@outlook.com>
Co-authored-by: gullradriel <3157857+gullradriel@users.noreply.github.com>

firmware/application/apps/ui_settings.hpp

@@ -127,11 +127,6 @@ class SetRadioView : public View {
     std::string title() const override { return "Radio"; };
 
    private:
-    const Style style_text{
-        .font = font::fixed_8x16,
-        .background = Color::black(),
-        .foreground = Color::light_grey(),
-    };
     uint8_t freq_step_khz = 3;
 
     Text label_source{