dropdown menu reusable interaction pattern

[jgiardino]

Whenever a toggle + menu interaction pattern is implemented in a component, the methods used to handle user interaction should be consistent across all the components that use this pattern.

This issue is to fully implement this interaction pattern for one of the components.
Then follow-up issues should capture this work for any other components that include this pattern.

Some of the components we have now that include this interaction pattern are:

• Dropdown
• Select
• Pagination
• Context Selector
• Wizard
• AppLauncher

Details about interaction pattern requirements

This work is dependent on having more modular components for menu and toggle available in core - patternfly/patternfly#1429

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.