Draft: Hotfix 7.10.6

• https://jira.open-xchange.com/browse/OXUIB-449
• https://jira.open-xchange.com/browse/OXUIB-1089
• https://jira.open-xchange.com/browse/OXUIB-1714
• https://jira.open-xchange.com/browse/OXUIB-1795
• https://jira.open-xchange.com/browse/OXUIB-1827
• https://jira.open-xchange.com/browse/OXUIB-1849
• https://jira.open-xchange.com/browse/OXUIB-1851
• https://jira.open-xchange.com/browse/OXUIB-1879
• https://jira.open-xchange.com/browse/OXUIB-1885
• https://jira.open-xchange.com/browse/OXUIB-1917
• https://jira.open-xchange.com/browse/OXUIB-1923
• https://jira.open-xchange.com/browse/OXUIB-1924 (was already fixed on hotfix-6178 branch)
• https://jira.open-xchange.com/browse/OXUIB-1933