refactor: rename linear head loss to Jlin

refs #585

src/app/calculators/pressureloss/en.json

@@ -23,10 +23,10 @@
     "Kloc": "Singular head loss coefficient",
     "Lg": "Pipe length",
     "fs_param_calc": "Calculation parameters",
-    "Jl": "Linear head loss",
+    "Jlin": "Linear head loss",
     "Klin": "Linear head loss coefficient",
     "fD": "Darcy friction factor",
 
-    "UNIT_JL": "m",
+    "UNIT_JLIN": "m",
     "UNIT_V": "m/s"
 }

src/app/calculators/pressureloss/fr.json

@@ -23,10 +23,10 @@
     "Kloc": "Coefficient de perte de charge singulière",
     "Lg": "Longueur du tuyau",
     "fs_param_calc": "Paramètres de calcul",
-    "Jl": "Perte de charge linéaire",
+    "Jlin": "Perte de charge linéaire",
     "Klin": "Coefficient de perte de charge linéaire",
     "fD": "Coefficient de perte de charge de Darcy",
 
-    "UNIT_JL": "m",
+    "UNIT_JLIN": "m",
     "UNIT_V": "m/s"
 }