main: Add an option to modify the currrent game's configuration

Creates a new entry in the Emulation menu called "Configure Current Game..." that is only available if a game is currently being executed in yuzu. When selected, it opens the game properties dialog for the current game.

Thanks to @BSoDGamingYT for reminding me to do this.

src/yuzu/main.ui

@@ -81,6 +81,7 @@
     <addaction name="action_Restart"/>
     <addaction name="separator"/>
     <addaction name="action_Configure"/>
+    <addaction name="action_Configure_Current_Game"/>
    </widget>
    <widget class="QMenu" name="menu_View">
     <property name="title">
@@ -287,6 +288,14 @@
     <string>Capture Screenshot</string>
    </property>
   </action>
+  <action name="action_Configure_Current_Game">
+   <property name="enabled">
+    <bool>false</bool>
+   </property>
+   <property name="text">
+    <string>Configure Current Game..</string>
+   </property>
+  </action>
  </widget>
  <resources/>
  <connections/>