Merge dev16.0 to dev16.0-vs-deps

Allow specific exception without crash in integration tests

Delayed failures in integration tests

This change ensures that logs are created even if the application fails
to capture a screenshot.

VisualStudioInstanceFactory failures now occur in a context where they
are reported as test failures instead of test runner crashes.

Merge dev16.0 to dev16.0-vs-deps

* Add a synced use enhanced color checkbox to C# and Basic advanced options.

* Use optionstore in DiagnosticWindow option pages

* Add option search keywords for enhanced color option

Add various bits of telemetry around DocumentClosed handling

Merge dev16.0 to dev16.0-vs-deps

Merge dev16.0 to dev16.0-vs-deps

Fix failure to validate caret position

Merge dev16.0-preview3-vs-deps to dev16.0-vs-deps

Merge remote-tracking branch 'upstream/dev16.0-preview3-vs-deps' into merges/dev16.0-preview3-vs-deps-to-dev16.0-vs-deps

Enable tests expected to pass with recent stabilization work

See #30599

Closes #19816
Closes #20868
Closes #20979
Closes #20991
Closes #21925
Closes #33103

Wait for design mode before closing a solution

Disable settings synchronization for integration testing

Use SendInput instead of WinForms' SendKeys

Fix integration test hangs

The delay introduces a period of time where the Navigate To preview
window can steal input focus, preventing the Enter key from correctly
triggering navigation. The race condition is relatively rare for users,
but occurs frequently enough in high-speed integration testing that it
poses an overall test reliability problem.

Fixes #19530
Fixes #30544