[FIX] point_of_sale: dot input should be recognized even at different lang

Language such as FR recognizes `,` as the decimal separator. However, it is
possible that the keyboard setting is American so the decimal point in the
numpad will send `.` when pressing it. POS should be able to recognize both.
This fix allows `.` sent from keyboard to be interpreted as decimal separator
even at language where the decimal separator is `,`. This is okay because
number inputs in POS doesn't take into account the thousand separator.

X-original-commit: 444fc5621b1157fe3c442f6a1aecfd00d5f8e5d7

addons/point_of_sale/static/src/js/Misc/NumberBuffer.js

@@ -226,7 +226,7 @@ odoo.define('point_of_sale.NumberBuffer', function(require) {
             };
             if (input === undefined || input === null) return;
             let isFirstInput = isEmpty(this.state.buffer);
-            if (input === this.decimalPoint) {
+            if (input === ',' || input === '.') {
                 if (this.state.toStartOver) {
                     this.state.buffer = '';
                 }