Review technical content: Desktop Wallet setup

Technical review of the Desktop Wallet setup and general features documentation to verify technical accuracy and completeness.

Review focus:

* Correctness of all technical information
* Completeness of information
* Removal of irrelevant or redundant information

Review is complete when:

* All technical information has been verified
* Missing information has been identified and added
* Irrelevant or redundant information has been deleted
* PR with necessary changes has been submitted

Pages to review:

1. [Set up the Desktop Wallet](https://docs.concordium.com/en/mainnet/docs/guides/overview-desktop.html): [https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/overview-desktop.rst](https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/overview-desktop.rst)
2. [Update the Desktop Wallet](https://docs.concordium.com/en/mainnet/docs/desktop-wallet/update-application.html): [https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/desktop-wallet/update-application.rst](https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/desktop-wallet/update-application.rst)
3. [Desktop Wallet navigation and settings](https://docs.concordium.com/en/mainnet/docs/desktop-wallet/accounts-desktop.html): [https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/desktop-wallet/accounts-desktop.rst](https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/desktop-wallet/accounts-desktop.rst)
4. [Reset Desktop Wallet data](https://docs.concordium.com/en/mainnet/docs/desktop-wallet/reset-data.html): [https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/desktop-wallet/reset-data.rst](https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/desktop-wallet/reset-data.rst)

Note: A separate review of language and style will be conducted after the technical review is complete.