Replace page-indicator icons with SCSS /copied from upstream shell theme

[Feichtmeier]

@madsrh @clobrano please test this on your bionic snap installations, if it works there we are golden. If not we need an extra branch for disco or for bionic

Eventually closes #1204

Before:

After:

Todo IF it works for bionic

• remove the unused assets

[didrocks]

A new test snap version is available using: snap refresh communitheme --channel=edge/yaru-pr1205.
Further available updates will track that pull request then.

Switch back to stable or edge snap with snap refresh communitheme --stable or snap refresh communitheme --edge once you are done with it!
You may want to download as well gtk-common-themes snap from edge/yaru-pr1205 channel to test your snaps with those changes.

Replace refresh with install if you haven't installed the snap yet.

[didrocks]

A new test snap version is available using: snap refresh communitheme --channel=edge/yaru-pr1205.
Further available updates will track that pull request then.

Switch back to stable or edge snap with snap refresh communitheme --stable or snap refresh communitheme --edge once you are done with it!
You may want to download as well gtk-common-themes snap from edge/yaru-pr1205 channel to test your snaps with those changes.

Replace refresh with install if you haven't installed the snap yet.

[Feichtmeier]

18.04, testing this snap

Works! 🎉 🎉