translation string fixes

Author: jef-n

src/app/qgsmapthemes.cpp

@@ -137,7 +137,7 @@ void QgsMapThemes::replaceTriggered()
     return;
 
   int res = QMessageBox::question( mMenu, tr( "Replace theme" ),
-                                   tr( "Are you sure you want to replace the existing theme “%1”?" ).arg( actionPreset->text() ),
+                                   trUtf8( "Are you sure you want to replace the existing theme “%1”?" ).arg( actionPreset->text() ),
                                    QMessageBox::Yes | QMessageBox::No, QMessageBox::No );
   if ( res != QMessageBox::Yes )
     return;

src/gui/qgspropertyassistantwidget.cpp

@@ -538,12 +538,12 @@ QgsPropertyGenericNumericAssistantWidget::QgsPropertyGenericNumericAssistantWidg
     minOutputSpinBox->setValue( 0.0 );
     minOutputSpinBox->setShowClearButton( true );
     minOutputSpinBox->setClearValue( 0.0 );
-    minOutputSpinBox->setSuffix( tr( " °" ) );
+    minOutputSpinBox->setSuffix( trUtf8( " °" ) );
     maxOutputSpinBox->setMaximum( 360.0 );
     maxOutputSpinBox->setValue( 360.0 );
     maxOutputSpinBox->setShowClearButton( true );
     maxOutputSpinBox->setClearValue( 360.0 );
-    maxOutputSpinBox->setSuffix( tr( " °" ) );
+    maxOutputSpinBox->setSuffix( trUtf8( " °" ) );
     exponentSpinBox->hide();
     mExponentLabel->hide();
     mLabelMinOutput->setText( tr( "Angle from" ) );