Merge branch 'style/particles-fix' into 'develop'

Style/particles fix

See merge request hub/hub!513

src/plainui/static/plainui/js/animations.js

@@ -503,11 +503,11 @@ initParticles(() => {
                 fps = cfg.fps
 
             var contentNode = document.getElementById(contentId),
-                height = getNodeHeight(contentNode),
                 width = window.innerWidth,
                 fpsInterval = 1000 / fps,
                 yOffset = 0,
                 canvas = document.getElementById(canvasId),
+                height = getNodeHeight(canvas),
                 ctx = canvas.getContext('2d'),
                 depthScaledHeight = height * (depth + 1)