indicators display order should be configurable

[davetsay]

Overview

Indicators are displayed just based on the order in which they were installed.

Expected Behavior

The order indicators are displayed should be configurable by priority instead of order installed.

Steps to Reproduce

order of indicators before merge

1. See that the order is still in the above order

[unlikelyzero]

@davetsay to add Testing Instructions

[nikhilmandlik]

Need to test this locally.

[akhenry]

Verified fixed. Installed and ran locally.

• Verified that the CLEAR DATA indicator was ordered by plugin registration.
• Modified the priority of the indicator to HIGH and verified that it was shown first.
• Modified the priority of the indicator to LOW and verified that it was shown last (except for the time indicator, as expected)