fix: solve concentric geometry in kernel

src/app/commands/draw.rs

@@ -1496,7 +1496,7 @@ impl OpenCADStudio {
                 }
             }
 
-            "NCONSTRAINT" | "GCCONCENTRIC" => {
+            "GCCONCENTRIC" => {
                 use crate::command::CmdResult;
                 use crate::modules::parametric::ConcentricConstraintCommand;
 

src/app/control/mod.rs

@@ -231,7 +231,7 @@ fn command_category(name: &str) -> &'static str {
         "VCONSTRAINT",
         "ECONSTRAINT",
         "TCONSTRAINT",
-        "NCONSTRAINT",
+        "GCCONCENTRIC",
         "NRCONSTRAINT",
         "LCONSTRAINT",
         "DELCONSTRAINT",