[josm-dev] Changes to fix accidental moving

[Gervase Markham]

Frederik Ramm wrote:
> I can't think of an application that does drag-select with shift only... 
> it's always the mouse without modifiers that selects something (and 
> deselects what you had before), while the shift-mouse adds to a selection.

Initial select is indeed done with the mouse without modifiers. It's 
only drag-select which requires the modifier.

This seemed to me to be a good compromise, given the exact issue that 
Martijn raises - when is a click and drag a move attempt, and when is it 
the beginning of a drag selection? My suggestion is to disambiguate 
using the shift key - hold it down, and you won't accidentally move 
anything.

Other drawing applications may possibly do drag-select without shift, 
but I don't think they generally run into the information density 
problems we have when zoomed out. I've certainly never edited a CAD file 
complex enough that I couldn't find an empty area to start a drag-select in.

Gerv