Add obs icon and set it as window icon.

obs/forms/OBSBasic.ui

@@ -26,6 +26,10 @@
   <property name="windowTitle">
    <string>.MainWindow</string>
   </property>
+  <property name="windowIcon">
+   <iconset resource="obs.qrc">
+   <normaloff>:/res/images/obs.png</normaloff>:/res/images/obs.png</iconset>
+  </property>
   <widget class="QWidget" name="centralwidget">
    <layout class="QVBoxLayout" name="verticalLayout">
     <item>

obs/forms/obs.qrc

@@ -7,6 +7,7 @@
     <file>images/live.png</file>
     <file>images/properties.png</file>
     <file>images/up.png</file>
+    <file>images/obs.png</file>
   </qresource>
   <qresource prefix="settings">
     <file>images/settings/network.png</file>