Added filter names and extension to save dialogs

On Windows and Linux, this change ensures that the picked filename has
the given file extension. If the user manually adds a file extension
in the input field, the default extension is appended.

On macOS, the users is asked if he wants to use a non-standard file
extension in case it has been changed.

Issue: #3826

name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/editor/ClientInput.java

@@ -309,6 +309,11 @@ private File pickFile(Shell shell, String extension, String fileNameProposal)
         FileDialog dialog = new FileDialog(shell, SWT.SAVE);
         dialog.setOverwrite(true);
 
+        // set filter names and extension to make sure the file name keeps the
+        // right extension.
+        dialog.setFilterNames(new String[] { Messages.LabelPortfolioPerformanceFile });
+        dialog.setFilterExtensions(new String[] { "*." + extension }); //$NON-NLS-1$
+
         // if an extension is given, make sure the file name proposal has the
         // right extension in the save as dialog
         if (extension != null && !fileNameProposal.endsWith('.' + extension))

name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/util/AbstractCSVExporter.java

@@ -22,7 +22,7 @@ public abstract class AbstractCSVExporter
 
     protected abstract Shell getShell();
 
-    private static final String[] FILTER_NAMES = { "CSV (*.csv)" }; //$NON-NLS-1$
+    private static final String[] FILTER_NAMES = { Messages.CSVImportLabelFileCSV };
     private static final String[] FILTER_EXTS = { "*.csv" }; //$NON-NLS-1$
 
     protected abstract void writeToFile(File file) throws IOException;

name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/views/AllTransactionsView.java

@@ -480,6 +480,9 @@ private SimpleAction.Runnable exportToJSON(String filename, List<TransactionPair
     {
         return action -> {
             FileDialog dialog = new FileDialog(Display.getDefault().getActiveShell(), SWT.SAVE);
+            dialog.setFilterNames(new String[] { Messages.CSVConfigCSVImportLabelFileJSON });
+            dialog.setFilterExtensions(new String[] { "*.json" }); //$NON-NLS-1$
+
             dialog.setFileName(TextUtil.sanitizeFilename(filename));
             dialog.setOverwrite(true);
             String name = dialog.open();

name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/views/QuotesContextMenu.java

@@ -219,6 +219,9 @@ public void run()
             public void run()
             {
                 FileDialog fileDialog = new FileDialog(Display.getDefault().getActiveShell(), SWT.SAVE);
+                fileDialog.setFilterNames(new String[] { Messages.CSVImportLabelFileCSV });
+                fileDialog.setFilterExtensions(new String[] { "*.csv" }); //$NON-NLS-1$
+
                 fileDialog.setFileName(TextUtil.sanitizeFilename(security.getName() + ".csv")); //$NON-NLS-1$
                 fileDialog.setOverwrite(true);
                 String fileName = fileDialog.open();

name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/wizards/datatransfer/CSVImportDefinitionPage.java

@@ -467,6 +467,8 @@ private void onConfigSaved()
     private void onConfigExport()
     {
         FileDialog dialog = new FileDialog(getControl().getShell(), SWT.SAVE);
+        dialog.setFilterNames(new String[] { Messages.CSVConfigCSVImportLabelFileJSON });
+        dialog.setFilterExtensions(new String[] { "*.json" }); //$NON-NLS-1$
 
         String proposal = TextUtil.sanitizeFilename(currentConfigLabel != null ? currentConfigLabel : "csv-config"); //$NON-NLS-1$
         dialog.setFileName(proposal + ".json");//$NON-NLS-1$

name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/wizards/datatransfer/ExportWizard.java

@@ -179,6 +179,8 @@ else if (exportItem instanceof String string)
                 name = string;
 
             FileDialog dialog = new FileDialog(getShell(), SWT.SAVE);
+            dialog.setFilterNames(new String[] { Messages.CSVImportLabelFileCSV });
+            dialog.setFilterExtensions(new String[] { "*.csv" }); //$NON-NLS-1$
             dialog.setOverwrite(true);
             if (name != null)
                 dialog.setFileName(TextUtil.sanitizeFilename(name + ".csv")); //$NON-NLS-1$