[FIX] web: Correct checklist style in report editor

Steps:
        - Go to studio
        - Open report editor in any report
        - Use Text block
        - Insert /checklist

Normal bullets without boxes are used in the report, because the checklist are styled separately in web_editor/static/lib/odoo-editor/src/checklist.css

opw-2995045

closes odoo/odoo#102072

X-original-commit: 9b4a1d3a45d294797813d653090b3a3c541210f5
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
Signed-off-by: Achraf <abz@odoo.com>

addons/web/static/src/webclient/actions/reports/report.scss

@@ -107,6 +107,35 @@ ol {
     padding-left: 0;
 }
 
+/* Checklist */
+ul.o_checklist {
+    > li {
+        list-style: none;
+        position: relative;
+        margin-left: 20px;
+
+        &:not(.oe-nested):before {
+            content: '';
+            position: absolute;
+            left: -20px;
+            display: block;
+            height: 14px;
+            width: 14px;
+            top: 1px;
+            border: 1px solid;
+            cursor: pointer;
+        }
+        &.o_checked:after {
+            content: "✓";
+            transition: opacity .5s;
+            position: absolute;
+            left: -18px;
+            top: -1px;
+            opacity: 1;
+        }
+    }
+}
+
 // Wkhtmltopdf doesn't handle flexbox properly, both the content
 // of columns and columns themselves does not wrap over new lines
 // when needed: the font of the pdf will reduce to make the content