Currently only way to select a lot of code from bottom to top is to press and hold shift+up, in that case multiple lines would be selected. But when you press shift+up multiple times, then it don't work: when you have a line selected, then pressing shift+up deselects everything and places the caret at the start of the text that was selected.
This issue reproduces in Safari and Firefox.
Confirmed. Reproducible in current dabblet too.
Strangely, selecting the lines the other way (Shift + down) seems to work fine (at least in Firefox).
Fix issue #98