The "Run" dialog failed when multiple parameters wee specified.
We use instead a newly-created ShellExecCmdLine() helper function to fix the problem (as found via API-tracing on Windows).
Note that ShellExecCmdLine() starts to be exported with Vista+.
- Implement ShellExecCmdLine() function in shell32.
- Add URL support.
- Fix RunDlgProc function in shell32.
- Add a testcase for ShellExecCmdLine() function.
CORE-14790