Added advanced settings to agent personal perferences.

[urbalazs]

Proposed change

New feature: advanced settings in agent personal preferences.

This feature allows agents to change more settings in their personal preferences. A new section called "Advanced" is displayed where agents can fine tune some settings related to agent interface.

The logic of this feature came from ((OTRS)) Community Edition, but the switch was part of Business Solution package. This means that an expert agent already had the possibility to activate this feature in the system, but it was not activated by default - only for Business Solution customers.

Thanks to László Gyaraki to find the way how to activate this feature.

Type of change

• '1 - 🚀 feature' - New feature (which adds functionality to an existing integration)

Checklist

• The code change is tested and works locally.(❗)
• There is no commented out code in this PR.(❕)
• You improved or added new unit tests.(❕)
• Local ZnunyCodePolicy passed.(❕)
• Local UnitTests / Selenium passed.(❕)
• GitHub workflow CI (UnitTests / Selenium) passed.(❗)