Change tui `mount_error_popup` to accept raw Errors instead of strings

[hasezoey]

This PR changes the Error-Popup to accept raw Errors, this way we can fully log the error cause and chain to the log and also to the tui. in some more details:

• move error logging from mount_error_popup to ErrorPopup::new
• change both function to accept anyhow::Error instead of str
• add a title to the ErrorPopup

some downsides: the ErrorPopup is limited to 4 lines of height, meaning better printing like the following is not possible until it changes:

Some Error

Caused by:
    0: Some Context
    1: Some original Error

and instead printed is

Some Error: Some Context: Some original Error

(which in longer chains may get cutoff)