Adhesive required to re-attach metal bracket to glass door on a gas cooker?

Due to an accident involving my grandson, a metal bracket has become detached from the outer glass panel on the main oven door of our Parkinson Cowan Town & Country Double Oven gas cooker.
Could anyone possibly recommend an adhesive which would be suitable for re-attaching that metal bracket ?
It must of course be able to withstand the heat generated in the oven; however there is an inner glass panel that provides some protection.
The bracket still has the original bonding agent attached to it. Should I remove that or would it be better to leave that in place ?