Change order of automatic virtualenv activation/deactivation (#6687)

When navigating from a virtualenv project directory, first deactivate the virtualenv.
Then, check to see if destination directory is also a virtualenv project directory.
If it is activate that virtualenv. See #5817.

plugins/virtualenvwrapper/virtualenvwrapper.plugin.zsh

@@ -77,6 +77,12 @@ if [[ ! $DISABLE_VENV_CD -eq 1 ]]; then
       else
         ENV_NAME=""
       fi
+      
+      if [[ -n $CD_VIRTUAL_ENV && "$ENV_NAME" != "$CD_VIRTUAL_ENV" ]]; then
+        # We've just left the repo, deactivate the environment
+        # Note: this only happens if the virtualenv was activated automatically
+        deactivate && unset CD_VIRTUAL_ENV
+      fi
       if [[ "$ENV_NAME" != "" ]]; then
         # Activate the environment only if it is not already active
         if [[ "$VIRTUAL_ENV" != "$WORKON_HOME/$ENV_NAME" ]]; then
@@ -86,10 +92,6 @@ if [[ ! $DISABLE_VENV_CD -eq 1 ]]; then
             source $ENV_NAME/bin/activate && export CD_VIRTUAL_ENV="$ENV_NAME"
           fi
         fi
-      elif [[ -n $CD_VIRTUAL_ENV && -n $VIRTUAL_ENV ]]; then
-        # We've just left the repo, deactivate the environment
-        # Note: this only happens if the virtualenv was activated automatically
-        deactivate && unset CD_VIRTUAL_ENV
       fi
     fi
   }