Company select list fixes

[alanhartless]

Q	A
Bug fix?	y
New feature?	n
Related user documentation PR URL	na
Related developer documentation PR URL	na
Issues addressed (#s or URLs)	#2649 #2683
BC breaks?	n
Deprecations?	n

Description:

This PR fixes

1. Editing Company Field from Contact Record #2649 where a company couldn't be removed
2. Company was not repopulated when editing the campaign set company action

Steps to test this PR:

1. Apply the PR
2. Edit a contact and assign a couple companies and save. Delete one save, then delete the second, save. On refresh each time, the company deleted should be gone with finally no companies are left.
3. Add a "add to company" campaign action. Choose a company and save. Edit the action and the company should be repopulated. Change the company, save, and edit. The new company should be populated.

Steps to reproduce the bug:

1. Same as above only for contact edit page, the one or more companies may not get deleted.
2. For campaign, the company will not prefill when editing the action.

[mqueme]

💯 👍

[mqueme]

This also fixes the update send to company company in a campaign

[escopecz]

Both fixes works for me as well. 👍