[FIX] web: group's count as the pager limit of grouped list

**Issue:**

When a group contains more than 10k items, its pager only shows
10k as limit, even if the group already knows it's total count.

**Solution:**

We now allow creation of `DynamicRecordList` with 'countLimit' as
one of the params. It will be used in the instantiation of the
class but will default to WEB_SEARCH_READ_COUNT_LIMIT if not
provided. This way, pager's limit will be properly set to the
group's count.

closes odoo/odoo#104698

X-original-commit: 4751f85ac9d430528106de05bcdc484ae0c7079b
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
Signed-off-by: Joseph Caburnay (jcb) <jcb@odoo.com>

addons/web/static/src/views/relational_model.js

@@ -1805,7 +1805,7 @@ export class DynamicRecordList extends DynamicList {
         /** @type {Record[]} */
         this.records = [];
         this.data = params.data;
-        this.countLimit = this.constructor.WEB_SEARCH_READ_COUNT_LIMIT;
+        this.countLimit = params.countLimit || this.constructor.WEB_SEARCH_READ_COUNT_LIMIT;
         this.hasLimitedCount = false;
     }
 
@@ -2569,6 +2569,7 @@ export class Group extends DataPoint {
             activeFields: params.activeFields,
             fields: params.fields,
             limit: params.limit,
+            countLimit: params.count,
             groupByInfo: params.groupByInfo,
             onCreateRecord: params.onCreateRecord,
             onRecordWillSwitchMode: params.onRecordWillSwitchMode,

addons/web/static/tests/views/list_view_tests.js

@@ -5203,6 +5203,35 @@ QUnit.module("Views", (hooks) => {
         );
     });
 
+    QUnit.test(
+        "pager, grouped, pager limit should be based on the group's count",
+        async function (assert) {
+            patchWithCleanup(DynamicRecordList, { WEB_SEARCH_READ_COUNT_LIMIT: 3 });
+            serverData.models.foo.records = [
+                { id: 121, foo: "blip" },
+                { id: 122, foo: "blip" },
+                { id: 123, foo: "blip" },
+                { id: 124, foo: "blip" },
+                { id: 125, foo: "blip" },
+                { id: 126, foo: "blip" },
+            ];
+            await makeView({
+                type: "list",
+                resModel: "foo",
+                serverData,
+                arch: '<tree limit="2"><field name="foo"/><field name="bar"/></tree>',
+                groupBy: ["foo"],
+            });
+
+            // unfold
+            await click(target.querySelector(".o_group_header:first-of-type"));
+            assert.strictEqual(
+                target.querySelector(".o_group_header:first-of-type .o_pager_limit").innerText,
+                "6"
+            );
+        }
+    );
+
     QUnit.test("list keeps offset on switchView", async (assert) => {
         assert.expect(3);
         serverData.views = {