[IMP] web: better positionning of daterangepicker

Before this commit, the daterangepicker always opened below the input,
even when there was not enough space to display it. Moreover, when the
user scrolled while the picker was opened, it wasn't stucked to the
input, so the picker was displayed at a random position after the
scroll.

With this commit, we compute the available space above the picker
when opening it, and if there is enough space, we display it above,
otherwise, we display it below. Moreover, we automatically close
the picker when the user scrolls.

task-2117229

closes odoo/odoo#42161

Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
Co-authored-by: Mohammed Shekha <msh@odoo.com>

addons/web/static/tests/fields/basic_fields_tests.js

@@ -3325,6 +3325,35 @@ QUnit.module('basic_fields', {
         form.destroy();
     });
 
+    QUnit.test('daterangepicker should disappear on scrolling outside of it', async function (assert) {
+        assert.expect(2);
+
+        this.data.partner.fields.datetime_end = {string: 'Datetime End', type: 'datetime'};
+        this.data.partner.records[0].datetime_end = '2017-03-13 00:00:00';
+
+        const form = await createView({
+            View: FormView,
+            model: 'partner',
+            data: this.data,
+            arch: `
+                <form>
+                    <field name="datetime" widget="daterange" options="{'related_end_date': 'datetime_end'}"/>
+                    <field name="datetime_end" widget="daterange" options="{'related_start_date': 'datetime'}"/>
+                </form>`,
+            res_id: 1,
+        });
+
+        await testUtils.form.clickEdit(form);
+        await testUtils.dom.click(form.$('.o_field_date_range:first'));
+
+        assert.isVisible($('.daterangepicker:first'), "date range picker should be opened");
+
+        form.el.dispatchEvent(new Event('scroll'));
+        assert.isNotVisible($('.daterangepicker:first'), "date range picker should be closed");
+
+        form.destroy();
+    });
+
     QUnit.module('FieldDate');
 
     QUnit.test('date field: toggle datepicker [REQUIRE FOCUS]', async function (assert) {