Improve the spaces between texts.

A client detected gaps and usable spaces that do not harm the reading of the text and can improve the visual experience of callbells. Here are his comments:

For example, in chat messages, a lot of space is wasted, such as:

• The space between messages takes up almost a line of text.
• ⁠The messages used for bot actions are also too many.
• ⁠The messages sent by the agent and the user only use 50% of the usable screen, when 70% of the width of the messages could be used and still be readable.