Error when no build volume is defined

[remcoder]

When no buildvolume property is present in defaultSettings, the preview will not load.

This is because if this vue binding v-model="settings.buildVolume.x".

But on the other hand we want the defaultSettings to map 1:1 to the options supplied to the preview, where unsetting the buildvolume is the way to not render it.

app.js:239 TypeError: Cannot read properties of undefined (reading 'x')
    at Proxy.render (eval at ux (vue.esm-browser.js:9:320), <anonymous>:206:71)
    at i3 (vue.esm-browser.js:5:64858)
    at ek.a [as fn] (vue.esm-browser.js:5:54759)
    at ek.run (vue.esm-browser.js:5:7255)
    at H (vue.esm-browser.js:5:55125)
    at U (vue.esm-browser.js:5:53357)
    at V (vue.esm-browser.js:5:53172)
    at x (vue.esm-browser.js:5:50125)
    at es (vue.esm-browser.js:5:59661)
    at mount (vue.esm-browser.js:5:60485)