[FIX] web: fix more menu
[FIX] web: fix more menu

Issue

	- Install Accounting
	- Resize your window to have the more menu
	- Refresh the page to make the JS working correctly
	- Click on the item on the left of the more menu
	- Do not close the menu just hover the more menu
	=> It doesn't appears (the .show class is on the last <li> child instead of the parent)
	Click on the more menu
	=> It appears but small & with items broken

Cause

	Without the :first, all the more menu dropdown where toggled

Issue

	Add :first to the target to toggle

OPW-2178843

closes odoo/odoo#46553

X-original-commit: 55a4a834461446a070ad06d1b24d67fbc27799a1
Signed-off-by: Jason Van Malder (jvm) <f3b543dc99538be7ecc03fd24be010615c4059c2@odoo.com>
Co-authored-by: aab-odoo <40b904fd8852297daeaeb426b1bca46fd2454aa3@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo