using the adapt signature option after changing a function definition in the cpp file removes the virtual keyword from the header file.

Reproducible: Always

Steps to Reproduce:
1. add function virtual void test(); to header file
2. add definition void test(){} to cpp file
3. add parameter to cpp file: void test(int val){}
4. use alt to bring up options, and use update declaration signature

Actual Results:  
header file now has void test(int val);

Expected Results:  
header file should have virtual void test(int val);