Describe the bug

If the browser zoom is set to a value different than 100%, scrolling to the bottom of the processes dropdown does not trigger the call to the second page.

To Reproduce

Steps to reproduce the behavior:

1. Lower the page size in scripts-select.component.ts (elementsPerPage) from 20 to 10 (since we only have 19 scripts on the sandbox environment);
2. Increase your browser's zoom so that it's above or below 100% - this is not reproducible with all values and can change ever across browsers and OSes;
3. Log in as an administrator, go to the processes page, proceed to create a new process;
4. Try to scroll the selector below the first 10 scripts. Is will not load any more scripts.

Expected behavior

The dropdown should load script when reaching the bottom, regardless of the browser zoom value.

Related work

Opening a PR in a bit!