fix: prevent scrollbars caused by moving snowflakes

Thanks to @jacopotediosi for the suggested fix

Closes #1

Author: foosel

octoprint_wrapped/static/pure-snow/pure-snow.css

@@ -1,3 +1,14 @@
+#snow {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    overflow: hidden;
+    pointer-events: none;
+    z-index: 32767;
+}
+
 .snowflake {
     z-index: 32768;
     position: absolute;

octoprint_wrapped/static/pure-snow/pure-snow.js

@@ -88,6 +88,8 @@ function getRandomArbitrary(min, max) {
 
 // Create style for snowflake
 function generateSnowCSS(snowDensity = 200) {
+    document.getElementById("snow").style.height = `${pageHeightVh}vh`;
+
     let snowflakeName = "snowflake";
     let rule = baseCSS;