set mnemonic widget and replace 24 with optimal height request

Change-Id: I86bb00f134aaf95a48ac0a5d594c632d03f0e9d5
coverity#982462 Dereference after null check

Change-Id: I5e90d51440afa4e317bc07ccb937f606edbc9eb9
drop helpids that go nowhere

Change-Id: Ie487d86b95f49812cd2f4620d6d652b7422e6139
coverity#982455 Dereference after null check

Change-Id: If4ad2fe763bffdb64119f7f2a5797aae588fbbf8