GUI: reworked GUI to support non-blocking UI:

- GUI: added non-blocking UI to almost all app and game dialogs;
- GUI: it allows to switch between UI dialogs and use any UI elements at any moment;
- GUI: it allows to use chat, card popup, battlefield, concede and other features while choosing (related to #12670);
- GUI: it allows to download images while playing (related to #4160, not fully tested);
- GUI: enabled by default, can be disabled by java option: -Dxmage.guiModalMode=true
- connection: auto-connect will be visible in main menu on startup;
- connection: removed some unused features (auto-connect by command line);
- connection: added <ESC> button to close connection dialog;
- download: added background images download (see non-blocking UI);
- download: improved cancel stability and fixes that it can't stop preparing/downloading process in some use cases;
- app: fixed freezes on macOS systems in some use cases (related to #12431, #11292, #9300, #4920);

Mage.Client/src/main/java/mage/client/dialog/NewTableDialog.java

@@ -35,7 +35,7 @@ public class NewTableDialog extends MageDialog {
 
     private static final Logger logger = Logger.getLogger(NewTableDialog.class);
 
-    private CustomOptionsDialog customOptions;
+    private final CustomOptionsDialog customOptions;
     private TableView table;
     private UUID playerId;
     private UUID roomId;
@@ -45,14 +45,11 @@ public class NewTableDialog extends MageDialog {
 
     private static final String LIMITED = "Limited";
 
-    /**
-     * Creates new form NewTableDialog
-     */
     public NewTableDialog() {
         lastSessionId = "";
         initComponents();
         this.customOptions = new CustomOptionsDialog(CustomOptionsDialog.SaveLoadKeys.TABLE, btnCustomOptions);
-        MageFrame.getDesktop().add(customOptions, JLayeredPane.MODAL_LAYER);
+        MageFrame.getDesktop().add(customOptions, customOptions.isModal() ? JLayeredPane.MODAL_LAYER : JLayeredPane.PALETTE_LAYER);
         player1Panel.showLevel(false);
         this.spnNumWins.setModel(new SpinnerNumberModel(1, 1, 5, 1));
         this.spnQuitRatio.setModel(new SpinnerNumberModel(100, 0, 100, 5));
@@ -480,12 +477,19 @@ public class NewTableDialog extends MageDialog {
     private void btnCancelActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnCancelActionPerformed
         this.table = null;
         this.playerId = null;
-        this.hideDialog();
+        doClose();
     }//GEN-LAST:event_btnCancelActionPerformed
 
     private void btnPreviousConfigurationActionPerformed(java.awt.event.ActionEvent evt, int i) {//GEN-FIRST:event_btnPreviousConfigurationActionPerformed
     }//GEN-LAST:event_btnPreviousConfigurationActionPerformed
 
+    private void doClose() {
+        if (this.customOptions.isVisible()) {
+            this.customOptions.hideDialog();
+        }
+        this.hideDialog();
+    }
+
     private void btnOKActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnOKActionPerformed
 
         MatchOptions options = getMatchOptions();
@@ -524,7 +528,7 @@ public class NewTableDialog extends MageDialog {
                     DeckImporter.importDeckFromFile(this.player1Panel.getDeckFile(), true),
                     this.txtPassword.getText())) {
                 // all fine, can close create dialog (join dialog will be opened after feedback from server)
-                this.hideDialog();
+                doClose();
                 return;
             }
         } catch (ClassNotFoundException | IOException ex) {