Repair failed LocalTests disabled in #15770

[DHowett]

TerminalAppLocalTests::TabTests::TryZoomPane [Failed]
TerminalAppLocalTests::TabTests::MoveFocusFromZoomedPane [Failed]
TerminalAppLocalTests::TabTests::CloseZoomedPane [Failed]
TerminalAppLocalTests::TabTests::SwapPanes [Failed]
TerminalAppLocalTests::TabTests::NextMRUTab [Failed]
TerminalAppLocalTests::TabTests::VerifyCommandPaletteTabSwitcherOrder [Failed]
TerminalAppLocalTests::TabTests::TestWindowRenameSuccessful [Failed]
TerminalAppLocalTests::TabTests::TestWindowRenameFailure [Failed]
TerminalAppLocalTests::TabTests::TestPreviewCommitScheme [Failed]
TerminalAppLocalTests::TabTests::TestPreviewDismissScheme [Failed]
TerminalAppLocalTests::TabTests::TestPreviewSchemeWhilePreviewing [Failed]
TerminalAppLocalTests::TabTests::TestClampSwitchToTab [Failed]
TerminalAppLocalTests::TabTests::TryDuplicateBadPane [Failed]
TerminalAppLocalTests::TabTests::TryDuplicateBadTab [Failed]

[j4james]

See also #14623.

[DHowett]

argh! Thank you