Fix error with unwanted scrolling when selectiong a tab. Issue: 1170

spyder/widgets/editor.py

@@ -568,7 +568,7 @@ def setup_editorstack(self, parent, layout):
             # a crash when the editor is detached from the main window
             # Fixes Issue 561
             self.tabs.setDocumentMode(True)
-        self.tabs.currentChanged.connect(self.current_changed)
+        self.tabs.currentChanged.connect(self.current_changed_tabs)
 
         if sys.platform == 'darwin':
             tab_container = QWidget()
@@ -1439,14 +1439,17 @@ def get_todo_results(self):
         if self.data:
             return self.data[self.get_stack_index()].todo_results
 
-    def current_changed(self, index):
+    def  current_changed_tabs(self, index):
+        self.current_changed(index, set_focus=False)
+
+    def current_changed(self, index, set_focus=True):
         """Stack index has changed"""
 #        count = self.get_stack_count()
 #        for btn in (self.filelist_btn, self.previous_btn, self.next_btn):
 #            btn.setEnabled(count > 1)
 
         editor = self.get_current_editor()
-        if index != -1:
+        if index != -1 and set_focus:
             editor.setFocus()
             if DEBUG_EDITOR:
                 print("setfocusto:", editor, file=STDOUT)