0.15.0 - order marks like the ping, camera tilt anywhere

Order marks in the look of the game's ping. No more line and ring on the ground after every order: a click gives a shockwave and a flash; while the order lasts, a thin beam rises to the ping's chevron with the order's icon (the game's own: running man, crossed swords, the object's icon). Heroes sent to one place share one mark. Routes and queued orders show only while Shift is held (option Interface/AlwaysShowRoutes brings them back). Colours are the game's ping colours.

Camera tilt anywhere. The middle button tilts the view at any zoom and from anywhere, from almost along the ground (2°) to straight down (90°). The zoom tilt is now a step of the wheel and no longer holds the view down close up; the drag may start over a panel and goes on at the screen edge.