Before this commit:
The Patience diff algorithm uses the text added in the `closestBlock` node to
the node where the powerbox is opened. If the user switched to a different block
using `ArrowLeft` or `ArrowRight` keys, it would result in the algorithm not
searching for the typed text in the other block.
After this commit:
The powerbox will be closed if the keyup event occurs in a different block than
the one in which the powerbox was initially opened.
task-3212128
closesodoo/odoo#141785
X-original-commit: 272614a7b668d361d6ea4177602b249608af34bb
Signed-off-by: Antoine Guenet (age) <age@odoo.com>