The body of the proposal is not rendered correctly

[Xfolchf]

Describe the bug
Quan introdueixes un enllaç (sense espais) en el contingut d'una proposta, aquest no es "talla" i passa per sobre del sidebar de la proposta. Veure imatge adjunt.

https://meta.decidim.org/static_map?sgid=BAh7CEkiCGdpZAY6BkVUSSI2Z2lkOi8vbWV0YWRlY2lkaW0vRGVjaWRbTo6TWVldGluZ3M6Ok1lZXRbmcvMTE1OQY7AFRJIgxwdXJwb3NlBjsAVEkiDGRlZmF1bHQGOwBUSSIPZXhwaXJlc19hdAY7AFRJIh0yMDE5LTAxLTEwVDE2OjIzOjM0Ljc3MFoGOwBU--1c11923c715a4a0a60091bec9cb744bdd95b933f

https://meta.decidim.org/processes/bug-report/f/210/proposals/13417

Screenshots
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Extra data (please complete the following information):

• Device: [e.g. iPhone6, Desktop]
• Device OS: [e.g. iOS8.1, Windows 10]
• Browser: [e.g. Chrome, Firefox, Safari]
• Decidim Version: [e.g. 0.10] 0.15
• Decidim installation: [e.g. MetaDecidim]

Additional context
Add any other context about the problem here.

[mrcasals]

@Crashillo this seems to be the same bug you fixed some days ago, but in another section. Can you check it please?