Use inline terms agreement for IM in Settings

[jryans]

With the IM in Settings, we appear to not show terms while changing the IM (which differs from changing the IS). For the IM, we currently accept the new IM without checking terms (reported by @BillCarsonFr).

We should ideally:

• prompt for terms agreement in the flow of changing the IM (as we do for the IS)

• show a warning icon on the IM section of Settings if we started off with an IM without terms agreement

(Screenshots grabbed from existing IS version, but should be adapted for IM.)

[turt2live]

Adding design label on this for sign off on the proposal.