Bug 26562: [20.05.x] Removes 'searches' from localStorage on logout

Bug 26562: [20.05.x] Removes 'searches' from localStorage on logout

A user recently logged in will inherit the "searches" item stored in localStorage.

To recreate:
Log in with user A, do some searches
Note that the "searches" item is filled in with the search queries
Logout and log in with user B
Note that the "searches" item is still there

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 402bf0240325a9a194dd6c62f7b4e478e1505b15)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>