Dear Mojang: you know how we can hover over mouse on an item and press a number key to select it in hotbar? well this function does not work when i switch the number ke to the side mouse button of my gaming mouse pls fix this

Put the summary of the bug you're having here

What I expected to happen was...:
item should come to the hotbar when i hover the mouse over it and click side mouse button

What actually happened was...:
Nothing happened 

Steps to Reproduce:
1. Change your hotbar number button to a gaming mouse side button from the control settings
2. Now hover your mouse over an item in your inventory and press the side mouse button 
3. The item will not come in the hotbar