gui_chili_chat2_1.lua: make vertical scrollbar ignore left-click + modifier key, and ignore other button except left-click. This to avoid stealing click when not specifically intended to (effect is big when in Low resolution and ChiliChat2 being placed on left of screen).
gui_chili_chat2_1.lua: allow spacebar on Vertical Scrollbar because its part of Spacebar+click shortcut
gui_chili_crudeplayerlist.lua & gui_chili_deluxeplayerlist.lua: vertical scrollbar only accept left-click to reduce chance of stealing click.
Merge pull request #53 from xponen/chilichat2.1

gui_chili_chat2_1.lua: make vertical scrollbar only listen to left-click (to reduce chance of stealing click)