[Fem] Clean up Fem.ts to remove extra translations

[chennes]

Fem.ts was not being updated by lupdate because it had extraneous translations in it. This PR removes those, and contains the full successful results of the unified C++ and Python lupdate runs.

Edited to add: I've also added a sed script to our tsupdate.py tool to strip out those translations if they occur in the future.

[FreeCAD-Tools]

Great work.

Will shortly explain. Fem.ts contained:

  <source>Fem</source>
  <translation>Fem</translation>

etc...
instead:

  <source>Fem</source>
  <translation type="unfinished"></translation>

And this caused an error when lupdate update Fem.ts file. As a result, new lines were not added to Fem.ts.

[freecadci]

for feature branch PR_5078. Pipeline #380452654 was triggered at ef7127a. All CI branch pipelines.

[FreeCAD-Tools]

Waiting for the request is merged and @yorikvanhavre to update Crowdin build again.

[berndhahnebach]

Despite it is FEM I can not say much since I do not know much about FreeCAD translation system. Means if the translation core devs are fine it is fine for me too.

[chennes]

Since @yorikvanhavre is the one who can upload the new strings to CrowdIn I think it makes the most sense to leave this to him.

[FreeCAD-Tools]

@berndhahnebach there is no other way, this mistake would have to be corrected sooner or later. I think everything should be normal.

[freecadci]

for feature branch PR_5078. Pipeline #384011477 was triggered at 4bb4203. All CI branch pipelines.

[freecadci]

for feature branch PR_5078. Pipeline #384021791 was triggered at ef7127a. All CI branch pipelines.

[yorikvanhavre]

Ok this looks good! I'm merging and I'll do a crowdin update right after