Fix two sources of runtime exceptions #18628
Merged
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_ApplyLanguageSettingChange
callsPrimaryLanguageOverride
(the WinRT API function) and we would call it every time a new
window is created. Now it's only called on settings load.
_RegisterTabEvents
would listen for "Content" changes which canbe null.
IVector::Append
throws if a null object is given.In our case, it's null if the content got erased with nothing.
Additionally, this fixes a bug where we wouldn't call
_ProcessLazySettingsChanges
on startup. This is important if thesettings file was changed while Windows Terminal wasn't running.
Lastly, there's a lifetime fix in this PR, which is a one-line change
and I didn't want to make a separate PR for that.