Add scrolling to short range chart
Undocumented feature, testing purposes only: Make animation timer interval settable via user defaults. Allows setting of maximum desired framerate on the fly.
make short range chart scrolling smooth and fix mouse
fix a few short range chart scrolling glitches
Merge pull request #98 from OoliteProject/scrolling-chart

Scrolling chart
Holding Ctrl while using arrow keys to move the cursor in the Short and Long Range Chart screens now doubles cursor speed.
double cursor speed for long range chart
Merge pull request #1 from OoliteProject/master

update