Missing warning when message cannot be sent

e.g. when there is no connection to the operator

• an unsent message just goes away 🥴
• plasmaphonedialer warning displays 😉
• Maybe a delayed sending like my email would be useful 🤔

SW/HW

• spacebar 21.05-1
• Linux plasma-mobile 5.12.8-1-MANJARO-ARM #1 (closed) (closed) SMP Fri May 28 12:10:54 UTC 2021 aarch64 GNU/Linux
• PinePhone