Favorite imports

I’d like something like Eclipse’s “Favorites” features for imports. In particular I’d like to be able to say “I like these classes and these static methods so when I hit ctrl-. on an unimported class give me those options first if they match”. This’d make imports a bit easier and static method imports much easier. I get that they are different things, but Eclipse sticks them together in its UI so I think of them as a single thing.

[fbricon]

New java.completion.favoriteStaticMembers preference allows you to define your favorite imports. Default values are:

	"java.completion.favoriteStaticMembers": [
		"org.junit.Assert.*",
		"org.junit.Assume.*",
		"org.junit.jupiter.api.Assertions.*",
		"org.junit.jupiter.api.Assumptions.*",
		"org.junit.jupiter.api.DynamicContainer.*",
		"org.junit.jupiter.api.DynamicTest.*"		
	]

[ADTC]

@fbricon Done with #424