Fixes JabRef#4437

Changed the sizes of buttons "Update to current column widths" and "Update to current column order"

There is still more to fix in this issue:
The Field name is not editable
The value in Field name is not identical with table header

src/main/java/org/jabref/gui/preferences/TableColumnsTab.java

@@ -314,10 +314,10 @@ public TableColumnsTab(JabRefPreferences prefs, JabRefFrame frame) {
         builder.add(tabPanel, 1, 5);
 
         Button buttonWidth = new Button("Update to current column widths");
-        buttonWidth.setPrefSize(200, 30);
+        buttonWidth.setPrefSize(300, 30);
         buttonWidth.setOnAction(e->new UpdateWidthsAction());
         Button buttonOrder = new Button("Update to current column order");
-        buttonOrder.setPrefSize(200, 30);
+        buttonOrder.setPrefSize(300, 30);
         buttonOrder.setOnAction(e->new UpdateOrderAction());
         builder.add(buttonWidth, 1, 6);
         builder.add(buttonOrder, 1, 7);