Create Alt click navigation --> use defaults for DCC tools

as a technical artist I want to have similar default navigation in viewports of DCC tools like maya and max is usually Alt + click based. It's familiar to the main group of users and it causes me lot of pain to change navigation when switching between softwares.

• rotate = Alt + left click
• pan = Alt + middle click
• zoom = Alt + right click

Also other defaults for mouse interaction and keyboard shortcuts should be consistent to DCC softwares.