Extra CMake Arguments tooltip shows wrong format

Steps to reproduce:

1. AS, plugin, etc.
2. Open "Settings" -> "Build, Execution, Deployment" -> "Qt"
3. Hover over "Extra CMake Arguments" input field and write the same line to the input
4. Build the project

Expected:

    Both arguments are used in the build

Actual:

    Only the first argument is used in the build, the format is wrong (it should be comma-separated)

So setting the value to "-DCMAKE_BUILD_TYPE=Release -DQT_ANDROID_ABIS:STRING=x86_64" will result in the following error:

ninja: error: CMakeFiles/rules.ninja:17: expected newline, got identifier
rule CXX_COMPILER__ottopreptoeptoetpreotepApp_unscanned_Release -DQT_AND...
^ near here