main/postmarketos-ui-phosh: adapt for Phosh 0.43
- add xdg-desktop-portal-phosh as dependency
- remove blue accent color override
should be merged after Alpine counterpart is merged: https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/75233
should be merged after Alpine counterpart is merged: https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/75233