I made quick for my personel use a little plugin.
So if you like to fill an object with different subtools, so you can do that for all subtools with one button.
Just select first Mrgb or Rgb or M at the main menue.
Go to Color Pallete and there you will find a new Submenue
"XYZ FillObject AllSubTools" and a new button "FillAllSub".
Install: unzip the XYZ FillAll SubTools file and put the FillAllSubTools.zsc Document in our ZStartup/ZPlugs folder
Maybe it can be usefull.
So , here is an update version with a smaller button !