Reorder source actions/refactorings

[CsCherrYY]

Currently the available quick assists, source actions and refactorings are ordered by a static sequence and it's not so good as many users expected. There is a WIP PR: #2109

Order proposal:

Source Actions

Organize imports
Generate Getters
Generate Setters
Generate Getters and Setters
Generate Constructors
Generate hashCode() and equals()
Generate toString()
Override/Implement Methods
Delegate Methods
Change modifiers to final where possible
Generate Tests

Refactoring

Extract Variable
Extract Constant
Extract Field
Introduce Parameter
Extract Method
Inline Method

[testforstephen]

Source Action list:
I favor "Organize imports" as the first menu.

[CsCherrYY]

see microsoft/vscode-java-test#1428 for reordering "Generate Tests..."