add 3rd party library note in Studio about window

apps/src/libvideostitch-gui/common.hpp

@@ -20,6 +20,7 @@
 #define VIDEOSTITCH_YOUTUBE_VAHANA_URL "https://www.youtube.com/playlist?list=PLE5eSxUoYnqgv4S8ayQ5_YsPP8x_MCvvM"
 #define VIDEOSTITCH_URL "https://github.com/stitchEm"
 #define VIDEOSTITCH_SUPPORT_URL "https://github.com/stitchEm"
+#define VIDEOSTITCH_LIBRARIES_URL "https://github.com/stitchEm/stitchEm/blob/master/doc/LICENSE-3RD-PARTY-LIBRARIES.md"
 
 // Color
 #define ORAH_COLOR "FF9E00";

apps/src/libvideostitch-gui/widgets/aboutwindow.cpp

@@ -6,10 +6,13 @@
 #include <QLabel>
 #include <QPushButton>
 #include <QDesktopServices>
+
 #include "aboutwindow.hpp"
 #include "version.hpp"
 #include "common.hpp"
 
+#include "libvideostitch-base/linkhelpers.hpp"
+
 AboutWidget::AboutWidget(QString version, QWidget* const parent) : QWidget(parent) {
   setupUi(this);
   buttonWebSite->setProperty("vs-button-medium", true);
@@ -18,6 +21,11 @@ AboutWidget::AboutWidget(QString version, QWidget* const parent) : QWidget(paren
                            .arg(QCoreApplication::applicationName())
                            .arg(QCoreApplication::organizationName())
                            .arg(QDate::currentDate().year()));
+
+  labelLibraries->setText(labelLibraries->text()
+                          .arg(QCoreApplication::applicationName())
+                          .arg(formatLink(VIDEOSTITCH_LIBRARIES_URL, "open source libraries.")));
+
   connect(buttonWebSite, &QPushButton::clicked, this, &AboutWidget::onButtonWebSiteClicked);
   labelAppVersion->setText(version);
   QIcon webIcon(":/live/icons/assets/icon/live/web.png");

apps/src/libvideostitch-gui/widgets/aboutwindow.ui

@@ -165,6 +165,25 @@
           </property>
          </widget>
         </item>
+        <item>
+         <widget class="QLabel" name="labelLibraries">
+          <property name="text">
+           <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;%0 uses code from %1&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+          </property>
+          <property name="textFormat">
+           <enum>Qt::RichText</enum>
+          </property>
+          <property name="alignment">
+           <set>Qt::AlignCenter</set>
+          </property>
+          <property name="openExternalLinks">
+           <bool>true</bool>
+          </property>
+          <property name="textInteractionFlags">
+           <set>Qt::TextBrowserInteraction</set>
+          </property>
+         </widget>
+        </item>
         <item>
          <spacer name="verticalSpacer_2">
           <property name="orientation">