Show completed stages v2

[cliffckerr]

@robynstuart adds the tick thing like an airline booking. (note: one-click booking to the capital of the current country project is slated for optima v3.)

example usage:

• load a demo project, the ticks appear
• upload concentrated.xlsx, the calibration is ticked but the other two aren't
• tick a program, and fill out the cost stuff, and the ticks will appear
• taketh away, and the ticks doth vanish

currently running on sandbox. somewhat tested but not extensively so, so see if you can break something!

[robynstuart]

@cliffckerr I've tried out various combinations & can't break it, so looks like it's good to merge. This looks great!!!