App loads cached version of aks-desktop/main.js

When creating new build App will use cached version (if present) of main.js in plugins instead of the current one

Steps to reproduce:
1. Introduce new change in plugins/aks-desktop code
2. Make new build
3. Open app, check if the new change is loaded

Start by reproducing the build after changing code under plugins/aks-desktop, then inspect how the app loads plugins/aks-desktop/main.js and handles cached files. Done means opening a newly built app loads the changed main.js rather than an older cached version.

Written by the indexing model from the issue text.