Code Completion Smartness Improvement

Per survey feedback, I'm creating a mega issue for all code completion smartness improvements.

A few things that customers already ask:

Theme: existing commands from other products

• - sout / syso : prints System.out.printIn()
• - soutm: adds the current class and method names
• - soutp: adds method parameter names and values
• - soutv: adds the last variable value
• - Sc -> Scanner

Theme: Provide better revelance when working in specific projects

• - Java AWT packages missing when working on GUI applications
• - Anything else that can improve the relevance

Theme: Code-sensitive code completion check

• - Optimize for different cases of code blocks
• - Don't display ElementScanner when user just types all lower case letters "else"

Theme: Enum case auto-generation

• - Generate switch cases for all enum values

Theme: Array

• - Auto complete code snippet int[n][n] - > new int[n][n]

Theme: Main function

• - When user types public static void main, it shouldn't generate main function signature twice

Theme: Generic arguments

• - More intelligent <> completion (such List<> )

Theme: Signature Help Improvement

• - “When I calling a method, intellisense displays the parameters only ONE time. Basically, it displays the parameters, then as I start putting the values for those parameters, the parameters list disappears”