Generated translated desktop files without direct installation #58

Here are two separate issues that both occurred during the preparation of desktop file translation in tdevelop:

If the desktop file has a short name that may conflict with the keyword, this will cause CMP0054 during the test to see if it should be processed as a configuration file. This applies, for example, to a file named simply 'c'.
Some desktop files do not have to be installed directly, but packaged in a tarball during build. Therefore, there is a need to generate a translated desktop file that is not directly installed. See, for example, the cpp/dcopservice application template.

Nice and clean 👍