Completed comparison table functionality and fixed bugs.

Finished the comparison table functionality. Table will now only show
rows of completed plan calculations so that users can compare the
results of their completed plans.

BUG FIX: Discovered that all calculate buttons were being disabled at
once when only one needed to be (i.e. when adding a row to plan 1, the
calculate button for all plans became disabled). Now works by only
selecting the calculate button in the active formContainer.

BUG FIX: Discovered that delete buttons were being enabled/disabled
incorrectly, similar to the calculate bug above. Also fixed by only
selecting delete buttons in the active formContainer.