Fix multiple times occurring filter icon

[io-95]

Description

Fixed the bug of filter icon that occurres multiple times on the invoices dashboard page. The bug is fixed by checking in the tablefy.js file if the page is initiated the first time or is it reloaded from the cache. The bug is fixed due to improve the User Expirience.

Checklist

• [x] Ran the Black Formatter and djLint-er on any new code (checks will fail without)
• [x] Made any changes or additions to the documentation where required
• [x] Changes generate no new warnings/errors
• [x] New and existing unit tests pass locally with my changes

What type of PR is this?

• 🐛 Bug Fix

Added/updated tests?

• 🙅 no, because they aren't needed

Related PRs, Issues etc

• Related Issue #511
• Closes #511