Add InvalidPathException handling on file open

When you open a PdfFile with an invalid path, it could cause an
InvalidPathException instead of the NoSuchFileException, as it uses the
newer toPath methods within PdfFile. In such cases there would be no
feedback in the UI and just nothing would happen. Now it should behave
like expected.

Author: Eswcvlad

src/main/java/com/itextpdf/rups/controller/RupsInstanceController.java

@@ -72,6 +72,7 @@ This file is part of the iText (R) project.
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.nio.file.Files;
+import java.nio.file.InvalidPathException;
 import java.nio.file.NoSuchFileException;
 import java.util.function.Consumer;
 import javax.swing.JOptionPane;
@@ -196,8 +197,8 @@ public void loadFile(File file, boolean requireEditable) {
             readerController.getParser().setDocument(pdfFile.getPdfDocument());
             // At this point consider the file opened, so it can be added to MRU
             RupsConfiguration.INSTANCE.getMruListHandler().use(file);
-        } catch (NoSuchFileException e) {
-            final String msg = String.format(Language.ERROR_CANNOT_FIND_FILE.getString(), e.getFile());
+        } catch (InvalidPathException | NoSuchFileException e) {
+            final String msg = String.format(Language.ERROR_CANNOT_FIND_FILE.getString(), file);
             LoggerHelper.warn(msg, e, RupsInstanceController.class);
             Rups.showBriefMessage(msg);
             // Might as well remove file from MRU list, if it doesn't exist