Steps:
1. Load the default session, and load an exist project or create a new project in the session.
2. Create a new session from file menu.
Execute File->Session->Session manager to open the session manager window.
Click new button and fill the new session name in the poped up window.
Click "OK" button to close the poped up window and click "Close" button on the session manager window to close the session manager window.
A new session created and shows in the sessions list of the session sub menu.
3. Click the new session you have created from the session sub menu.
4. Check the left bottom Tool bar.

Issue found:

The :"target selector" button not disabled. Click "target selector" button, the target select window shows strange.

Addition information: Change the session from develop page, the target selector will disable.