Fem: Fix Gmsh preferences file chooser

src/Mod/Fem/Gui/DlgSettingsFemGmsh.ui

@@ -86,7 +86,7 @@
            </size>
           </property>
           <property name="text">
-           <string>Gmsh binary path</string>
+           <string>Gmsh path</string>
           </property>
          </widget>
         </item>

src/Mod/Fem/Gui/DlgSettingsFemGmshImp.cpp

@@ -83,15 +83,10 @@ void DlgSettingsFemGmshImp::changeEvent(QEvent* e)
     }
 }
 
-void DlgSettingsFemGmshImp::onfileNameSelected(QString FileName)
+void DlgSettingsFemGmshImp::onfileNameSelected(const QString& fileName)
 {
-    if (!FileName.isEmpty() && QStandardPaths::findExecutable(FileName).isEmpty()) {
-        QMessageBox::critical(
-            this,
-            tr("Not an executable binary"),
-            tr("The specified file \n'%1'\n does not exist or is not executable.\n"
-               "Specify another file.")
-                .arg(FileName));
+    if (!fileName.isEmpty() && QStandardPaths::findExecutable(fileName).isEmpty()) {
+        QMessageBox::critical(this, tr("Gmsh"), tr("Executable '%1' not found").arg(fileName));
     }
 }
 

src/Mod/Fem/Gui/DlgSettingsFemGmshImp.h

@@ -41,7 +41,7 @@ public:
     ~DlgSettingsFemGmshImp() override;
 
 protected Q_SLOTS:
-    void onfileNameSelected(QString FileName);
+    void onfileNameSelected(const QString& fileName);
 
 protected:
     void saveSettings() override;