dependencies editor: show more detailed text for unnamed module libraries composed of several files (IDEA-154044)

java/idea-ui/src/com/intellij/openapi/roots/ui/OrderEntryAppearanceServiceImpl.java

@@ -110,7 +110,8 @@ public class OrderEntryAppearanceServiceImpl extends OrderEntryAppearanceService
     }
 
     final String url = StringUtil.trimEnd(files[0], JarFileSystem.JAR_SEPARATOR);
-    return SimpleTextCellAppearance.regular(PathUtil.getFileName(url), PlatformIcons.LIBRARY_ICON);
+    String text = ProjectBundle.message("library.unnamed.text", PathUtil.getFileName(url), files.length - 1);
+    return SimpleTextCellAppearance.regular(text, PlatformIcons.LIBRARY_ICON);
   }
 
   @NotNull

platform/projectModel-impl/src/messages/ProjectBundle.properties

@@ -198,6 +198,7 @@ library.sources.node=Sources
 project.order.entry.project=<Project>
 jdk.missing.item=<No SDK>
 library.empty.library.item=Empty Library
+library.unnamed.text={0} and {1, choice, 1#one more file|2#{1} more files}
 module.type.java.name=Java Module
 module.type.java.description=Java modules are used for developing <b>JVM-based</b> desktop and web applications, including applications that use <b>Java EE</b> and other enterprise development frameworks.
 module.type.unknown.name=Unknown module type. Used \"{0}\" as a substitute