Zero query is the state where the search box is empty when it was previously active.

ZERO_QUERY is HALF mode with just an empty SearchBox.
In the future it will contain Zero query search suggestions.

ZERO_QUERY entry points:
Deleting all text from an active SB in HALF
Clicking the X to clear the SB from HALF
Tapping the App List View with an active query(in HALF), which clears the text from the SB. 


FULLSCREEN_ZERO_QUERY entry points:
From FULLSCREEN_SEARCH:
-Tap/click the AppListView
-Delete all text from the SearchBox
-Tap/click the x button.

From FULLSCREEN_ALL_APPS:
Tapping/clicking the app list view closes the app list if the event propogates back to the applistview without being handled.

From PEEKING:
Tapping/clicking the AppListView closes the app list if the event propogates back to the AppListView without being handled.

Also:
In this CL Mouse drag will be disabled.