Fix effects like tracker broken on some locales

data/effects/tracker.xml

@@ -48,7 +48,7 @@
     <name>Motion Tracker</name>
     <description>Select a zone to follow its movements</description>
     <author>Jean-Baptiste Mardelle</author>
-    <parameter type="geometry" name="rect" default="50%,50%:25%x25%" fixed="1" opacity="false" conditional="1">
+    <parameter type="geometry" name="rect" default="50% 50% 25% 25%" fixed="1" opacity="false" conditional="1">
         <name>Rectangle</name>
     </parameter>
     <parameter type="list" name="algo" default="KCF" paramlist="KCF;CSRT;MOSSE;MIL;BOOSTING;TLD" conditional="1">

src/assets/model/assetparametermodel.cpp

@@ -226,8 +226,14 @@ void AssetParameterModel::internalSetParameter(const QString &name, const QStrin
             m_params[pName].value = val;
         }
     }
-    bool conversionSuccess;
-    double doubleValue = locale.toDouble(paramValue, &conversionSuccess);
+    bool conversionSuccess = true;
+    double doubleValue = 0;
+    if (paramValue.simplified().contains(QLatin1Char(' '))) {
+        // Some locale interpret a space as thousands separator
+        conversionSuccess = false;
+    } else {
+        doubleValue = locale.toDouble(paramValue, &conversionSuccess);
+    }
     if (conversionSuccess) {
         m_asset->set(name.toLatin1().constData(), doubleValue);
         if (m_fixedParams.count(name) == 0) {