Update Papers to current git snapshot and adapt spec file to changed directory
structure (RHEL-74354):
- request lower version of gtk4 since we don't have it
- modify spec file to accomodate git snapshot temporarily
- remove PostScript and XPS dependencies since their support was removed
- turn off spell check as the dependency is not yet in our repository
This update contains updated widget for viewing of signatures (RHEL-4187).
This update also contains fix for showing of check mark for "Night Mode" (RHEL-70154).
Resolves: RHEL-74354, RHEL-4187, RHEL-70154
