Fix a bug in the *.spec files and also apply the following major changes:

- Add support for adding the base folder to PATH.
- Only display one pop up window at a time in order to avoid confusion.
- Add automatic updates feature:
	- Windows and Linux versions will be shipped with an updater program used to
	  update both Artemis and the updater itself.
	- MacOs versions will not have the updater. Instead the user will be asked
	  to download the new software version (if present) via browser.

src/artemis.ui

@@ -9514,6 +9514,7 @@ QSlider::handle:horizontal {
     </property>
     <addaction name="action_check_db_ver"/>
     <addaction name="action_update_database"/>
+    <addaction name="action_check_software_version"/>
    </widget>
    <widget class="QMenu" name="menu_themes">
     <property name="title">
@@ -9592,6 +9593,11 @@ QSlider::handle:horizontal {
     <string>GitHub</string>
    </property>
   </action>
+  <action name="action_check_software_version">
+   <property name="text">
+    <string>Check software version</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>