WIP: Alert for remove support

There some things need suggestions?
1. "Remove support for this initiative" is button now, need suggestion how to switch code into emblem syntax, also wonder do you prefer it be button or clickable link text like "Make a suggestion"
2. making-a-suggestion-to-an-initiative-test.js need suggestions on testing the submit button is disabled by default. 
3. test on removing support also need hints, when write test on click "Remove support for this initiative", it always complain "Error: Element [object Object] not found."
AlertModalController (file name: alert_modal.js)