eth_sendTransaction to an edit page instead

I have been trying to make a donation button via metamask and managed to connect it with the
eth_sendTransaction, but it always takes to the transaction screen where the gas price is unknown and the user will have to edit etc (cant upload the image here but this is what I mean imgur . com/2ZGPXNO)

Is it possible to make a popup appear right to the edit screen where the user select the gas price and the amount they want to donate like here imgur . com/6hPWtPE ?