Fix path to ui element modules for python without local search path

Author: Fayvel Victor

src/m64py/ui/input.ui

@@ -1459,7 +1459,7 @@ QGroupBox::title {
   <customwidget>
    <class>InputButton</class>
    <extends>QPushButton</extends>
-   <header>inputbutton.h</header>
+   <header location="global">m64py/ui/inputbutton.h</header>
   </customwidget>
  </customwidgets>
  <resources>

src/m64py/ui/romlist.ui

@@ -309,7 +309,7 @@ QGroupBox::title {
   <customwidget>
    <class>ImageView</class>
    <extends>QGraphicsView</extends>
-   <header location="global">imageview.h</header>
+   <header location="global">m64py/ui/imageview.h</header>
   </customwidget>
  </customwidgets>
  <resources/>