Give eeschema the same trackpad center/zoom as pcbnew

[Robert Poor]

Version: KiCad v 5.0.0-rc2-dev-310 with “modern toolset”
Environment: macOS v10.13.3 on a MacBook Pro (with trackpad)

Summary: Give eeschema the same trackpad GUI for center / zoom as pcbnew uses

Details:

I discovered (more or less by accident) that in pcbnew, I could "two finger tap" the trackpad to center the drawing at the current cursor location (i.e. bring drawing and cursor to the center of the screen), and then use two fingers on the trackpad to zoom in and out around that point.

I found that to be intuitive and -- crucially -- a VERY FAST way to navigate.

The same is not true in eeschema. I type [F4] to center the screen -- this requires leaving the trackpad and two hands to type it. Then I have to type multiple [Option-Command]+ to zoom in and [Option-Command]- to zoom out -- also requiring two hands.

This is NOT a fast way to navigate.

It would make me so very happy if eeschema could adopt this little bit from the pcbnew GUI.