Move campaign mission images to share/ instead of hardcoding them into frontend
Hardcoding campaign mission images prevented add-ons from adding their own preview images.
<!DOCTYPE RCC>
<RCC version="1.0">
<qresource prefix="/">
<file>main.qml</file>
<file>Page1.qml</file>
<file>Page1Form.ui.qml</file>
<file>qtquickcontrols2.conf</file>
</qresource>
</RCC>