Updated to take the latest distro changes.

* Move webview's use of setIgnoreMenuShortcuts to main processes

Part of #95955

Switches from calling `setIgnoreMenuShortcuts` on the renderer to calling it on the main thread

* Use channels for communication instead of ipc

* Cleanup ipc implementation

* Rename webviewMainService -> WebviewManagerService

* Add property default show context value proeprty

* Change precedence

defaultShowContextValue takes precedence
over
reusePriorSearchConfiguration

* Respect 0 as a default context lines value
Co-authored-by: NJackson Kearl <jakearl@microsoft.com>

highly scoped implementation for select boxes and dropdowns that need it
fixes #90729
fixes #93415

refs #93964

* Apply Dockerfile highlighting to Containerfile

* Recognize Containerfile in Search Editor highlighting

* Register opening Containerfile files on macOS

* Register opening Containerfile files on Windows