MidasCivil_Toolkit: Capturing when an absolute value for distance has been used

[peterjamesnugent]

The string used to define a beam load does not change whether the distance from A/B is entered as a parameter or absolutely. This is something we should make abundantly clear in the Wiki.

For example, with an element of 1m or less, it would be impossible to tell if the distance is parametric or absolute.