Message limit

[tomastiminskas]

We need to find a way to increase message length limit beyond 869 bytes. When sending a file attachment inside a thread and replying to a message the limit could be reached based on all that data (media info, thread uuid and reply uuid) and could happen that no even a word can be entered in the message field.

Just a ticket to keep in mind that we need to find a solution for this sooner or later.