Rémi Verschelde 32f5bee985 LineEdit: Respect max_length by truncating text to append ...

When appending text (either via `set_text()` or by pasting from clipboard),
if the input would make the `LineEdit` exceed its configured `max_length`,
the input text is truncated to fit. The discard part is passed as a parameter
in the `text_change_rejected` signal.

Fixes #33321.
Fixes #41278.

Also cleaned up unimplemented `max_chars` property in `TextEdit`.

Co-authored-by: Tony-Goat <70238376+Tony-Goat@users.noreply.github.com>
(cherry picked from commit 9a1ce8e6c3)

2021-07-13 10:20:02 +02:00

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