Allow adding new lines when enter key send is enabled

[mrfullset]

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• I am following the Code Style Guidelines
• I have tested my contribution on these devices:

• Samsung Galaxy S25, Android 16.0

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Fixes #14372, #14469

This PR fixes a regression happened in this commit a0997e6. I wasn't able to find an issue which produced this code, however it doesn't make sense. When there are attachments in a draft, everything works fine without the newly introduced line.

Screenshots from testing on Samsung S25:

Send with enter enabled:

Send with enter disabled:

[jeffrey-signal]

Thanks for the contribution @mrfullset! This was already fixed in v7.69.0 (b1feb76) 🙂