[WPF] Add TermCore null checks to HwndTerminal #14678
Merged
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#14461 is caused by a null pointer exception in
TerminalIsSelectionActive()
. Since this reveals that it is possible to enter a state where_terminal
is null, I've gone ahead and added null-checks throughout the code to make it more stable.Closes #14461
Validation Steps Performed
Ran locally. Still works.