Disable Sublime Text's own hovers if LSP provides feature

[tomv564]

As suggested by @deathaxe, Sublime's built-in hovers will likely flash on-screen before LSP's hovers pop up.

I've seen some packages provide instructions to the user on adding show_definitions: false to syntax-specific settings.

We could also set show_definitions to false programmatically per view once LSP has loaded, or perhaps there is another clever way to suppress sublime's hover until we've tried the language service?

[deathaxe]

For convenience I'd suggest to automatically disable it for a view, if LSP connects to a server.

view.settings().set("show_definitions", False)

Jedi - Python AutoCompletion package does so as well.