[cmake] `all` (and `clean`/`test`) targets are missing

up to qtc-4.12 one could build the 'all' target via `cm all` via the locator. with qtc-4.13 this is not possible anymore.

my projects usually have many targets, where the "build steps" are configured to build the <Current executable>. if that is set, the only way to build the whole project, is to `cm all` in the locator. it would be great if the `all` (and also the `clean`) targets could be restored