Fix word wrapping in main window

[larathbone]

Hey, thanks for creating a great app that makes Slack actually usable without being dog-slow on my underpowered 2in1 netbook.

I've noticed that full words aren't properly wrapped and long lines get wrapped mid-word. This makes reading messages a bit awkward. Is there any way this could be fixed?

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Version: 'master' (installed April 17 2020)
Installation method: go install