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: https://github.com/eclipse/eclipse.jdt.ls/pull/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 https://github.com/microsoft/vscode-java-test/issues/1428 for reordering "Generate Tests..."