Add menu item for our Patreon page

See issue #1425.

src/MainWindow.cpp

@@ -2258,6 +2258,11 @@ void MainWindow::on_actionWebsite_triggered()
     QDesktopServices::openUrl(QUrl("https://sqlitebrowser.org"));
 }
 
+void MainWindow::on_actionDonatePatreon_triggered()
+{
+    QDesktopServices::openUrl(QUrl("https://www.patreon.com/bePatron?u=11578749"));
+}
+
 void MainWindow::updateBrowseDataColumnWidth(int section, int /*old_size*/, int new_size)
 {
     QSet<int> selectedCols(ui->dataTable->selectedCols());

src/MainWindow.h

@@ -268,6 +268,7 @@ private slots:
     void on_actionBug_report_triggered();
     void on_actionSqlCipherFaq_triggered();
     void on_actionWebsite_triggered();
+    void on_actionDonatePatreon_triggered();
     void updateBrowseDataColumnWidth(int section, int /*old_size*/, int new_size);
     bool loadProject(QString filename = QString(), bool readOnly = false);
     void saveProject();

src/MainWindow.ui

@@ -1013,6 +1013,7 @@ You can drag SQL statements from an object row and drop them into other applicat
     <addaction name="actionWiki"/>
     <addaction name="actionSqlCipherFaq"/>
     <addaction name="actionBug_report"/>
+    <addaction name="actionDonatePatreon"/>
     <addaction name="helpAboutAction"/>
    </widget>
    <widget class="QMenu" name="menuTools">
@@ -1765,6 +1766,18 @@ You can drag SQL statements from the Schema column and drop them into the SQL ed
     <enum>QAction::NoRole</enum>
    </property>
   </action>
+  <action name="actionDonatePatreon">
+   <property name="icon">
+    <iconset resource="icons/icons.qrc">
+     <normaloff>:/icons/browser_open</normaloff>:/icons/browser_open</iconset>
+   </property>
+   <property name="text">
+    <string>&amp;Donate on Patreon...</string>
+   </property>
+   <property name="menuRole">
+    <enum>QAction::NoRole</enum>
+   </property>
+  </action>
   <action name="actionSaveProject">
    <property name="icon">
     <iconset resource="icons/icons.qrc">