fix: About window now is a dialog

ui/squawk.cpp

@@ -637,14 +637,13 @@ void Squawk::onContextAboutToHide()
 void Squawk::onAboutSquawkCalled()
 {
     if (about == nullptr) {
-        about = new About();
+        about = new About(this);
         about->setAttribute(Qt::WA_DeleteOnClose);
         connect(about, &Settings::destroyed, this, &Squawk::onAboutSquawkClosed);
-    } else {
-        about->raise();
-        about->activateWindow();
     }
     about->show();
+    about->raise();
+    about->activateWindow();
 }
 
 Models::Roster::ElId Squawk::currentConversationId() const

ui/widgets/about.cpp

@@ -25,7 +25,7 @@ static const std::string QXMPP_VERSION_MAJOR(std::to_string(QXMPP_VERSION >> 16)
 static const QString QXMPP_VERSION_STRING = QString::fromStdString(QXMPP_VERSION_MAJOR + "." + QXMPP_VERSION_MINOR + "." + QXMPP_VERSION_PATCH);
 
 About::About(QWidget* parent):
-    QWidget(parent),
+    QDialog(parent),
     m_ui(new Ui::About),
     license(nullptr)
 {
@@ -37,7 +37,11 @@ About::About(QWidget* parent):
     m_ui->qxmppVersionValue->setText(QXmppVersion());
     m_ui->qxmppBuiltAgainstVersion->setText(tr("(built against %1)").arg(QXMPP_VERSION_STRING));
 
-    setWindowFlag(Qt::Tool);
+    setWindowFlag(Qt::WindowStaysOnTopHint);
+    move(
+          parent->window()->frameGeometry().topLeft() +
+          parent->window()->rect().center() - rect().center()
+       );
 
     connect(m_ui->licenceLink, &QLabel::linkActivated, this, &About::onLicenseActivated);
 }

ui/widgets/about.h

@@ -17,7 +17,7 @@
 #ifndef ABOUT_H
 #define ABOUT_H
 
-#include <QWidget>
+#include <QDialog>
 #include <QScopedPointer>
 #include <QApplication>
 #include <QFile>
@@ -32,7 +32,7 @@ class About;
 /**
  * @todo write docs
  */
-class About : public QWidget
+class About : public QDialog
 {
     Q_OBJECT
 public: