[#1468] Dashboard loading empty if base URL is given (#1469)

Repositories with more than 19 different types of files will crash,
which can be traced from line 448 of `v_summary.js`.

Bug is caused by a function not being copied properly in #1421,
leading to an undefined function call.

Let's copy the function over properly.

frontend/src/static/js/utils/ramp_colour_generator.js

@@ -1,7 +1,10 @@
+// eslint-disable-next-line new-cap
+const randomGenerator = new Math.seedrandom('Seeded Random Generator');
+
 function getRandomHex() {
   const maxHexColorValue = 16777214;
   // excludes #000000 and #FFFFFF as they are reserved
-  return `#${Math.round(this.randomGenerator() * maxHexColorValue + 1).toString(16).padStart(6, '0')}`;
+  return `#${Math.round(randomGenerator() * maxHexColorValue + 1).toString(16).padStart(6, '0')}`;
 }
 
 function rgb2lab(rgb) {

frontend/src/static/js/v_summary.js

@@ -28,8 +28,6 @@ window.vSummary = {
       maxDate: '',
       fileTypeColors: {},
       isSafariBrowser: /.*Version.*Safari.*/.test(navigator.userAgent),
-      // eslint-disable-next-line new-cap
-      randomGenerator: new Math.seedrandom('Seeded Random Generator'),
       filterGroupSelectionWatcherFlag: false,
     };
   },