feat: update slider + create

- got rid of commented out css
- update about tab UI
- add reset icon to reset text
- change link colour
- add number to show value on slider
- reorder greeting settings to make a bit more sense

src/scss/_variables.scss

@@ -82,7 +82,7 @@ $themes: (
     'modal-background': #2f3542,
     'modal-sidebar': #353b48,
     'modal-sidebarActive': rgba(65, 71, 84, 0.9),
-    'link': rgba(83, 82, 237, 1),
+    'link': rgb(108, 108, 238),
   ),
 );