https://apps.openerp.com/apps/modules/12.0/w_disable_debug_mode/ this will help you

For odoo version 13 you can hide debug for particular group by using below code.
@classmethod    
def _handle_debug(cls):
# Store URL debug mode (might be empty) into session
        if 'debug' in request.httprequest.args:
            debug_mode = []
            for debug in request.httprequest.args['debug'].split(','):
                if debug not in ALLOWED_DEBUG_MODES:
                    debug = '1' if str2bool(debug, debug) else ''                                              debug_mode.append(debug)
            debug_mode = ','.join(debug_mode)
            # Write on session only when needed            
            if request.session.uid:
                user = request.env["res.users"].sudo().browse(request.session.uid)
            else:
                user = request.env["res.users"]
            if debug_mode != request.session.debug and user.has_group('allowed_group'):
                request.session.debug = debug_mode
            else:
                request.session.debug = ''

Dear Concern, 

Hope you are fine. 

I am facing same problem. I have tried to your solution. But nothing solve the issue.

Although i am using odoo 11. 

I have follow your post. I have inherited WebSettingsDashboard  and send user_id = request.env.user.id

 But i can't understand your post  where you said "I get user_id in template by widget.data.user_id"

Would you please describe details. or post details. Now what can i do please suggest me. 

It will be very helpful for me.