4.1.9.0
Update CHANGES and bump version
Merge pull request #2273 from DamirAinullin/improve_linq_query
change PAC URL only when SystemProxy.Update
Misc
Refine HotkeyReg logic
null check for TranslateForm
Refine sysproxy exception handling.
Merge pull request #2722 from rwasef1830/show-plugin-output