title: Visual Studio 2017 enable completion after character is typed in F#
body: <p>I'm developing a F# project using Visual Studio 2017.
  Before, I've used C# and I'm used to great autocompletion in VS that automatically pops-out and shows me a list of local variables, methods and so on when I press any character. </p>
  
  <p>Unfortunately, in F# I need to force autocompletion to show by pressing <code>ctrl + space</code>. It shows automatically when I type <code>someObject.</code>, but I need to type entire phrase <code>someObject</code> or press <code>ctrl + space</code> every time I want VS to complete long variable name for me. It gets pretty annoying as I'm used to similar feature in VS Code, Sublime, and C# in VS and it really speeds up coding.</p>
  
  <p>I wonder if there is any setting / plugin / hack to have such feature when using F# inside Visual Studio?
  Is it possible to mock <code>ctrl + space</code> when I type any character in code editor? </p>