FXOLAT-321: prevent red screen in admin controller if no i18n keys are found...

FXOLAT-321: prevent red screen in admin controller if no i18n keys are found for a language, fix the olat.properties for i18n source

src/main/java/org/olat/core/util/i18n/ui/I18nConfigController.java

@@ -21,7 +21,6 @@
 
 package org.olat.core.util.i18n.ui;
 
-import java.io.File;
 import java.util.Locale;
 import java.util.Set;
 
@@ -121,7 +120,11 @@ class I18nConfigController extends FormBasicController {
 			if (explLang != null && !explLang.equals(key)) all += " (" + key + ")";
 			// count translation status
 			int keyCount = i18nMgr.countI18nItems(i18nMgr.getLocaleOrNull(key), null, true);
-			all += "   <span class='b_translation_status'>" + (keyCount * 100 / referenceKeyCount) + "%</span>";
+			if(keyCount > 0) {
+				all += "   <span class='b_translation_status'>" + (keyCount * 100 / referenceKeyCount) + "%</span>";
+			} else {
+				all += "   <span class='b_translation_status'>0%</span>";
+			}
 			availableValues[i] = all;
 		}
 		ArrayHelper.sort(availablelangKeys, availableValues, false, true, false);

src/main/resources/serviceconfig/olat.properties

@@ -354,7 +354,7 @@ course.display.participants.count=true
 is.translation.server=disabled
 # Path to the CVS "olat3" project that contains the languages DE and EN
 # During development this is normally /workspace/olat/src/main/java
-i18n.application.src.dir =${project.build.home.directory}
+i18n.application.src.dir=
 # Path to any directory that contains
 # translatable packages other than DE and EN which are in the application source directory
 # During development this is normally ${i18n.application.src.dir}