fixing an issue where tab order was broken

step to repro:
- open terminator
- open a new tab
- in new tab, split axis
- go to first tab
- create a new tab
- Ctrl-shift-N around and the order is not respected

terminator

@@ -1172,7 +1172,11 @@ class Terminator:
     notebook.set_current_page(-1)
     terminal._vte.grab_focus ()
     
-    index = self.term_list.index(widget)
+    #adding a new tab, thus we need to get the 
+    # last term of the previous tab and add
+    # the new term just after
+    sibling = self._notebook_last_term(notebook.get_nth_page(notebook.page_num(terminal)-1))
+    index = self.term_list.index(sibling)
     self.term_list.insert (index + 1, terminal)
     return (True)
       

terminatorlib/config.py

@@ -113,6 +113,7 @@ class TerminatorConfValuestore:
     'ignore_hosts'          : ['localhost','127.0.0.0/8','*.local'],
     'encoding'              : 'UTF-8',
     'active_encodings'      : ['UTF-8', 'ISO-8859-1'],
+    'background_image'      : '',
   }
 
   def __getattr__ (self, keyname):