Change "OpenExternallyCalledFolderInNewTab" to false by default

src/settings/dolphin_generalsettings.kcfg

@@ -32,7 +32,7 @@
         </entry>
         <entry name="OpenExternallyCalledFolderInNewTab" type="Bool">
             <label>Should an externally called folder open in a new tab in an existing Dolphin instance</label>
-            <default>true</default>
+            <default>false</default>
         </entry>
         <entry name="Version" type="Int">
             <label>Internal config version of Dolphin, mainly Used to determine whether an updated version of Dolphin is running, so as to migrate config entries that were removed/renamed ...etc</label>