Add minimum value for pathNumberSpin

mainwindow.ui

@@ -78,6 +78,12 @@
          <height>27</height>
         </rect>
        </property>
+       <property name="minimum">
+        <number>1</number>
+       </property>
+       <property name="value">
+        <number>1</number>
+       </property>
       </widget>
       <widget class="QLineEdit" name="titleEdit">
        <property name="geometry">