'Calculate acoustics parameters' should not be possible of a '.recps' file (sound level per source)

[Picaut]

Describe the bug
Right clicking on a '.recps' file gives the possibility to execute the 'Calculate acoustics parameters' option. However, this should not be possible since the 'recps' file has not time value.

To Reproduce
Steps to reproduce the behavior:

1. Run an SPPS calculation on a valid scene, with a punctual receiver
2. In the Results tab, right click on a '.recps' file (SOund level per source)

Expected behavior
this should not be possible since the 'recps' file has not time value.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information): See 'About I-Simpa' for the Version and build

• OS: Windows 10
• Version: 1.3.4
• Build date: 2020-12-04T09:10:49