Improved formatting of last message in ConversationListElement

[clemensott]

• Limits the count of lines of the last message of a chat that are displayed in the chat preview to 2 lines. Currently, are all lines displayed, which can take a lot of space. I think a limit of 2 lines is enough but 3 or 4 wouldn't hurt. What do you think?
• Added TextWrapping for long lines

Examples

Desktop

Before:

Now:

Mobile

Before:

Now:

Message Text

This is the first line
This is the second line and it is much longer which results in a line break
This is the third line
4
5
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8
9