v2.6
-Fix Explorer pinning: Add fallbacks for Shell commands (fixes #1599)
- WebFlowCredentials: Make username comparison case-insensitive
-ActivityListModel: Show full date and time as a Tooltip only
-Disable HTTP/2 for now due to Qt bug, allow enabling it via env var
-Fix Explorer integration re-save and hide option on non-Window
-Updater: Add query-parameter 'updatesegment' to the update check
-Allow Desktop translation merging and custom backport branches
