Review technical content: Desktop Wallet sections under "Account activities"

Technical review of Desktop Wallet-specific content found within the Account activities section. **Review only the Desktop Wallet parts of each page.**

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 (**Desktop Wallet content only**):

1. [Send CCD](https://docs.concordium.com/en/mainnet/docs/guides/send-ccd-wallets.html): [https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/send-ccd-wallets.rst](https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/send-ccd-wallets.rst)
2. [Add a validator](https://docs.concordium.com/en/mainnet/docs/mobile-wallet/add-baker-mw.html): [https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/mobile-wallet/add-baker-mw.rst](https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/mobile-wallet/add-baker-mw.rst)
3. [Change validator options](https://docs.concordium.com/en/mainnet/docs/mobile-wallet/update-baker-mw.html): [https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/mobile-wallet/update-baker-mw.rst](https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/mobile-wallet/update-baker-mw.rst)
4. [Delegate to a staking pool or passive delegation](https://docs.concordium.com/en/mainnet/docs/guides/add-delegation.html): [https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/add-delegation.rst](https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/add-delegation.rst)
5. [Remove delegation to a staking pool or passive delegation](https://docs.concordium.com/en/mainnet/docs/guides/remove-delegation.html): [https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/remove-delegation.rst](https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/remove-delegation.rst)
6. [Update delegation to a staking pool or passive delegation:](https://docs.concordium.com/en/mainnet/docs/guides/update-delegation.html) [https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/update-delegation.rst](https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/update-delegation.rst)

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

Start by reviewing the Desktop Wallet sections in send-ccd-wallets.rst, add-baker-mw.rst, update-baker-mw.rst, add-delegation.rst, remove-delegation.rst, and update-delegation.rst. Verify technical information, identify and add missing information, and remove irrelevant or redundant content. Done means the six pages have been technically reviewed and a PR with the necessary changes has been submitted.

Written by the indexing model from the issue text.