For the more advanced users, having an option to remove/lower the countdown on the uninstall box would be nice to have. I went into the code myself and dropped it to 0.1 as opposed to the default, as I don't need to be warned for several seconds about what I'm doing.
Could add it as a subtype CVar so that users could set it themselves.
timer.Simple( 5, function() if IsValid( f ) then b1:SetEnabled( true ) end end )
Would become:
timer.Simple( GetConVarNumber( "addon_manager_warntimer" ), function() if IsValid( f ) then b1:SetEnabled( true ) end end )