#13126 RiaLogging: Extract errorInMessageBox to RiuMessageDialog

Move the QMessageBox-displaying helper out of the logging utility into a
dedicated UI class. RiaLogging.h no longer pulls QMessageBox/QWidget into
the ~270 files that include it. Behavior is preserved: showError displays
the dialog when running interactively (and not under regression tests),
then forwards the text to RiaLogging::error.

ApplicationLibCode/Commands/RicImportObservedDataFeature.cpp

@@ -20,6 +20,7 @@
 
 #include "RiaApplication.h"
 #include "RiaLogging.h"
+#include "RiuMessageDialog.h"
 
 #include "RimObservedDataCollection.h"
 #include "RimObservedSummaryData.h"
@@ -80,7 +81,7 @@ void RicImportObservedDataFeature::selectObservedDataFileInDialog()
 
         if ( !errorText.isEmpty() )
         {
-            RiaLogging::errorInMessageBox( nullptr, "Errors detected during import", errorText );
+            RiuMessageDialog::showError( nullptr, "Errors detected during import", errorText );
         }
     }