Adds attributes for controlling the window created via dialog()

Fixes #2947

Author: hluk

docs/scripting-api.rst

@@ -1103,6 +1103,8 @@ unlike in GUI, where row numbers start from 1 by default.
    -  '.style' - Qt style sheet for dialog
    -  '.height', '.width', '.x', '.y' - dialog geometry
    -  '.label' - dialog message (can contain basic HTML)
+   -  '.modal' - set to true to make the dialog modal (to avoid other CopyQ windows to get input focus)
+   -  '.onTop' - set to true for the dialog to stay above other windows
 
    :returns: Value or values from accepted dialog or ``undefined`` if dialog
              was canceled.

src/scriptable/scriptableproxy.cpp

@@ -2118,6 +2118,10 @@ int ScriptableProxy::inputDialog(const NamedValueList &values)
             createAndSetWidget<QLabel>("text", value.value, parent);
         else if (value.name == ".defaultChoice")
             inputDialog.defaultChoice = value.value.toString();
+        else if (value.name == ".modal")
+            dialog.setModal(value.value.toBool());
+        else if (value.name == ".onTop")
+            dialog.setWindowFlag(Qt::WindowStaysOnTopHint, value.value.toBool());
         else
             widgets.append( createWidget(value.name, value.value, &inputDialog) );
     }

src/tests/tests_scripts.cpp

@@ -376,6 +376,19 @@ void Tests::commandDialog()
         [&]() { RUN(WITH_TIMEOUT "dialog('.title', 'Remove Items', '.label', 'Remove all items?') === true", "true\n"); },
         [&]() { RUN(Args() << "keys" << "focus::QPushButton in dialog_Remove Items:QDialog" << "ENTER", ""); }
     );
+
+    RUN(Args() << "keys" << clipboardBrowserId, "");
+    const QByteArray script2 = R"(
+        dialog(
+            '.modal', true,
+            '.onTop', true,
+            'text', 'DEFAULT',
+        )
+    )";
+    runMultiple(
+        [&]() { RUN(WITH_TIMEOUT + script2, "DEFAULT\n"); },
+        [&]() { RUN(Args() << "keys" << "focus::QLineEdit in :QDialog" << "ENTER", ""); }
+    );
 }
 
 void Tests::commandDialogCloseOnDisconnect()