Feature/get pre canvas #256

Merged r-kuraoka merged 5 commits into nitta-lab-2021:master from nitta-lab-2021:feature/get_pre_canvas on 29 Oct 2021

2021-10-28	fa59472 Browse files » Merge branch 'master' into feature/get_pre_canvas k-fujii committed on 28 Oct 2021
	ee569f7 Browse files » [update]前のページを透過して表示するようにしました。赤色の部分がそうです。 k-fujii committed on 28 Oct 2021
	8640269 Browse files » Merge branch 'master' into feature/get_pre_canvas ... # Conflicts: # app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintCanvas.java # app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintViewModel.java # app/src/main/java/org/ntlab/acanthus_client/views/paint/models/PageConnectionModel.java # app/src/main/java/org/ntlab/acanthus_client/views/paint/models/PaintConnectionModel.java # app/src/main/java/org/ntlab/acanthus_client/views/paint/page/PageActivity.java k-fujii committed on 28 Oct 2021
	4abec34 Browse files » [update]前のページを透過して表示できるようにしました k-fujii committed on 28 Oct 2021
	3d875eb Browse files » [update]一時退避 k-fujii committed on 28 Oct 2021