Doc/install.fedora: Cosmetic: Fix indentation

Signed-off-by: Jerome Flesch <jflesch@wyplay.com>
doc/install.(debian|fedora): Add missing build dependency

Signed-off-by: Jerome Flesch <jflesch@wyplay.com>
Update paperwork.desktop

value "paperwork.svg" for key "Icon" in group "Desktop Entry" is an icon name with an extension, but there should be no extension as described in the Icon Theme Specification if the value is not an absolute path.
Merge branch 'unstable' into wip-remake-scan-process