[FIX] account: reconciliation model buttons leak out of the screen

Steps to reproduce:

- install accounting
- go to accounting > accounting > reconciliation (you need at least
one unpaid invoice and one unreconciled payment for the proper screen
to show)
- manual operations > click the cog icon > create model
- create a model with a long name and duplicate it 5-10 times
- go back to the reconciliation tool > manual operations

Previous behavior:
the model buttons leak out of the right of the screen

Current behavior:
An horizontal scrollbar appears if necessary

opw-2185355

closes odoo/odoo#45431

X-original-commit: e24d971ad8d1bfdef8fc55710d99fc29c29a9c31
Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>

addons/account/static/src/scss/account_reconciliation.scss

@@ -294,6 +294,7 @@
     /* Create view */
     .create {
         > div > div.quick_add > .o_reconcile_models {
+            max-width: 100%;
             max-height: 54px;
             overflow: auto;
         }