a very quick solution to get my functionality (windows only):
Open LaunchWindows.cpp, look for the line
if( FPlatformMisc::IsDebuggerPresent() && !GAlwaysReportCrash )
change it to
if( (FPlatformMisc::IsDebuggerPresent() && !GAlwaysReportCrash) || FParse::Param(CmdLine, TEXT("nocrashreports")))
now create a batch file where your uproject file is. Content:
<path-to-your-engine-folder>\Engine\Binaries\Win64\UE4Editor.exe -nocrashreports <path-to-your-uproject-file>
Now use the batch file to start the editor. When it crashes there is no crash reporter but windows asks you to attach a debugger.