xz-git: update to version 5.1.4beta.r21.g107a263
claws-mail-git: update to version 3.11.1.r26.g00cade7
opera-beta: update to version 26.0.1656.20
opera-developer: update to version 27.0.1689.0
vis-git: update to version 0.r283.gd790924