Revert "Revert "Update TerminalTab.cpp""

This reverts commit 69787f0.

src/cascadia/TerminalApp/TerminalTab.cpp

@@ -1593,28 +1593,10 @@ namespace winrt::TerminalApp::implementation
  // the same read-only status.
  void TerminalTab::SetPaneReadOnly(const bool readOnlyState)
  {
- auto hasReadOnly = false;
- auto allReadOnly = true;
- _activePane->WalkTree([&](const auto& p) {
- if (const auto& control{ p->GetTerminalControl() })
- {
- hasReadOnly |= control.ReadOnly();
- allReadOnly &= control.ReadOnly();
- }
- });
  _activePane->WalkTree([&](const auto& p) {
  if (const auto& control{ p->GetTerminalControl() })
  {
- // If all controls have the same read only state then just disable
- if (allReadOnly || !hasReadOnly)
- {
- control.SetReadOnly(readOnlyState);
- }
- // otherwise set to all read only.
- else if (!control.ReadOnly())
- {
- control.SetReadOnly(readOnlyState);
- }
+ control.SetReadOnly(readOnlyState);
  }
  });
  }