I have uploaded mintty 3.4.0 with the following changes:
Highlights
* Optional tabbar.
* Supporting new xterm mouse mode with pixel reporting.
Window handling / Tabs
* Optional tabbar for interactive virtual tabs session switching (#944).
* Fixed maximised/fullscreen synchronisation among sessions/tabs.
* Fixed state inconsistencies after minimizing synchronized windows
(#699, ~#944).
Window handling
* Fixed offset of saved image.
* Fixed themes list and interactive theme switching feedback
(mintty/wsltty#251).
* Support system hotkey for activation in "Quake mode" (#1029).
Mouse handling
* If ZoomMouse=false, Ctrl+mouse-wheel scrolls by 1 line per notch
(#1032).
* Configurable number of scroll lines per mouse wheel notch (#1032).
* Support mousewheel reporting (e.g. for shell history scrolling) in
normal screen mode (~#1032).
* Nudge complete delivery of application scrollbar sequences by delay
(#1033).
Terminal features
* Mouse mode 1016 with pixel coordinates (xterm 360).
* XTPUSHSGR foreground/background changed to 30/31 (xterm 357).
* Align OSC response terminator (ST or BEL) with request terminator
(#1028, xterm).
* Fixed invalid IME cursor colour after OSC 112 "Reset cursor colour"
(#942).
Configuration
* New option TabBar and command-line option --tabbar (#944).
* New user-definable functions clear-title, refresh.
* New option LinesPerMouseWheelNotch (#1032).
* Option KeyFunctions: flexible specification of modifiers (in any
order).
The homepage is at http://mintty.github.io/
It also links to the issue tracker.
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Thomas