Feature Request: Additional refactorings

[randroid88]

Please add more Refactoring options like Intellij IDEA:

• Safe Delete - "Makes sure that you do not delete files that are referenced in your source code."
• Copy/Move - "Copies/Moves an element."
• Extract Method - "These refactoring actions help you reduce the code duplication." (Done)
• Extract Constant (Done)
• Extract Field
• Extract Parameter
• Extract Variable (Done)
• Rename - "Renames an element." (Done)
• Inline - "Acts as opposite of extracting."
• Change signature - "Changes the call signature of a method or class."