#447 - Add period to file name to omit uncompressed images from results

src/main/java/org/eclipsefoundation/react/service/impl/DefaultImageStoreService.java

@@ -112,7 +112,7 @@ public class DefaultImageStoreService implements ImageStoreService {
         // get the the full file name without extension given a format and base filename
         String santizedName = ImageFileHelper.sanitizeFileName(fileName, format);
         // for images whos file name starts with `<sanitized org name>.`, delete them
-        try (DirectoryStream<Path> ds = getFilesStartingWith(santizedName)) {
+        try (DirectoryStream<Path> ds = getFilesStartingWith(santizedName + '.')) {
             // convert the stream to a list
             List<Path> matchingPaths = StreamSupport.stream(ds.spliterator(), false).collect(Collectors.toList());
             if (matchingPaths.isEmpty()) {