Unity3d and monodevelop c# scripting on ubuntu 16.04 IntelliSense problems

I did install monodevelop and unity after it on my ubuntu 16.04. Everything works fine but in monodevelop when I'm writing scripts on C# I want to see full description of Unity methods/classes/events/etc. And I see only the declaration and parameters and no more info. I tried many things unsuccessfully.
In Unity preferences I have checked: Auto Refresh, Add .unityproj's to .sln, Editor Attaching. Also I chose External Script Editor as file in my folder usr/bin/monodevelop(shell script type). ExternalScript Editor Args: "$(File)". In Build settings i have checked: Development Build, Script Debugging. Still though I don't have an option Sync MonoDevelop Project in Assets or just right-clicking on C# script as recommended in many resources to do.
On my side-OS Win 8.1 I have everything working as I want it to without any additional actions using MVS Community 2015. It shows all the description of methods and classes.
I really want to stay on linux and learn development from here, but every step takes so much time and effort that I'm switching back to windows where most of the things are just smoother and easier to do. Well sorry, maybe somebody knows how to make my MD work as I want it to?