Better Add Class behavior for cmake projects that use GLOB/GLOB_RECURSE

When using Qt Creator with a cmake project that uses file(GLOB_RECURSE VAR *.cpp) and adding a new class, Qt Creator still switches to CMakeLists.txt and modifies the add_executable directive.

Example CMakeLists.txt:

cmake_minimum_required(VERSION 3.5)
project(qt-cmake-test LANGUAGES CXX)

file(GLOB_RECURSE FOO_SRC Foo/*.cpp Foo/*.h)
add_executable(qt-cmake-test ${FOO_SRC})

When adding a class Something, the last line is changed to:

add_executable(qt-cmake-test ${FOO_SRC}
    Foo/Something.h Foo/Something.cpp)

(One can select "Add to project: <None>" in the wizard, but this choice is not remembered for next time and Qt Creator still opens and switches to CMakeLists.txt)

To reduce friction, I propose the following:

• Add option to disable automatic modifications to CMakeLists.txt

Alternatively:

• make Qt Creator remember the choice "Add to project: <None>" in the Add Class Wizard

Additionally:

• disable opening of (and switching to) CMakeLists.txt, (especially) if no modifications were made
• Add option to trigger an automatic re-run of CMake after adding a new class