Manning: Add parameter to setup manning coef instead of strickler, and switch the value on the view only, but keeps strickler value in the model for the solvers

src/config.py

@@ -37,7 +37,7 @@ logger = logging.getLogger()
 
 class Config(SQL):
     def __init__(self):
-        self._version = '0.0.8'
+        self._version = '0.0.9'
         self.filename = Config.filename()
         self.set_default_value()
 
@@ -215,6 +215,12 @@ class Config(SQL):
                       )
                     """)
 
+                if int(release) < 9:
+                    self.execute(
+                        "INSERT OR IGNORE INTO data "
+                        "VALUES ('display_manning', 'False')"
+                    )
+
             self.execute(
                 f"UPDATE info SET value='{self._version}' " +
                 "WHERE key='version'"
@@ -275,6 +281,11 @@ class Config(SQL):
         # self.backup_path = v[0]
         v = self.execute("SELECT value FROM data WHERE key='backup_frequence'")
         self.backup_frequence = v[0]
+        # Friction coefficient display
+        v = self.execute(
+            "SELECT value FROM data WHERE key='display_manning'"
+        )
+        self.display_manning = v[0] == "True"
         # v = self.execute("SELECT value FROM data WHERE key='backup_max'")
         # self.backup_max = int(v[0])
 
@@ -342,6 +353,7 @@ class Config(SQL):
             "backup_enable": self.backup_enable,
             # "backup_path": self.backup_path,
             "backup_frequence": self.backup_frequence,
+            "display_manning": self.display_manning,
             # "backup_max": self.backup_max,
             "editor": self.editor,
             "lang": self.lang,
@@ -424,6 +436,7 @@ class Config(SQL):
         self.backup_enable = True
         # self.backup_path = ""
         self.backup_frequence = "00:15:00"
+        self.display_manning = False
         # self.backup_max = 10
 
         # Editor