Fix the schedule dialog box not being closed by esc
Fix the schedule dialog box not being closed by esc

Gives the schedule dialog box a tabIndex of 0 so that
it can be focused.
Now the dialog box closes when esc is pressed, like normal.

Fixes #196

ccqi/rmc,UWFlow/rmc,shakilkanji/rmc,duaayousif/rmc,JGulbronson/rmc,rageandqq/rmc,UWFlow/rmc,MichalKononenko/rmc,shakilkanji/rmc,rageandqq/rmc,rageandqq/rmc,duaayousif/rmc,rageandqq/rmc,shakilkanji/rmc,JGulbronson/rmc,duaayousif/rmc,sachdevs/rmc,shakilkanji/rmc,UWFlow/rmc,JGulbronson/rmc,JGulbronson/rmc,ccqi/rmc,sachdevs/rmc,ccqi/rmc,sachdevs/rmc,ccqi/rmc,JGulbronson/rmc,sachdevs/rmc,MichalKononenko/rmc,shakilkanji/rmc,UWFlow/rmc,duaayousif/rmc,UWFlow/rmc,duaayousif/rmc,MichalKononenko/rmc,rageandqq/rmc,ccqi/rmc,MichalKononenko/rmc,sachdevs/rmc,MichalKononenko/rmc