Safe Apps Developer Tools Release 7

This release:

safe-apps-sdk v2.4.0

• Allow managing logging, turn logging off by default #146

safe-apps-react-sdk v2.4.0

• Don't initialize SDK on every render in the react SDK #156
• Remove unused file in the react SDK

other packages

• update SDK versions

chore

• remove developer UI from the monorepo to a separate one https://github.com/gnosis/safe-apps-dev-ui