gs-loading-page.ui: Use full color icon instead of the symbolic icon
The loading screen looks a bit off, because
- The icon is huge, making the layout look a bit unbalanced
- There's a horizontal loading indicator, which uses a different blue than the rest of Adwaita
- The layout looks a bit cramped vertically
Some ideas for improving it:
- Make the icon about half the current size
- Replace the loading indicator with a spinner
- More vertical spacing between the elements
Edited by Milan Crha