Open Project from project menu Add-In

[TimoVJL]

These Add-Ins open new instance of poide.exe with project from
project context menu above project name.
Might be usable in workspace projects.

OpenPrj opens new instance as child process.

OpenPrjSE needs modification to registry settings, as it use
ShellExecute(), but it opens process as same level as calling poide.exe.