fix notebook 7 test

Author: bollwyvl

tests/acceptance/Notebook.robot

@@ -22,13 +22,15 @@ Launch Browser Tab
     Location Should Contain    foo
     Wait Until Page Contains    Hello World    timeout=10s
     Close Window
+    [Teardown]    Switch Window    title:Home
 
 Launch Another Browser Tab
     Launch With Toolbar Menu    bar
     Wait Until Keyword Succeeds    3x    0.5s    Switch Window    title:Hello World
     Location Should Contain    bar
     Wait Until Page Contains    Hello World    timeout=10s
     Close Window
+    [Teardown]    Switch Window    title:Home
 
 *** Keywords ***
 Start Notebook Tests
@@ -39,6 +41,8 @@ Start Notebook Tests
 Launch With Toolbar Menu
     [Arguments]    ${title}
     Mouse Over   ${XP_NEW_MENU}
+    Click Element    ${XP_NEW_MENU}
     ${item} =   Set Variable   ${XP_OPEN_COMMAND}//div[text() = '${title}']
     Wait Until Element Is Visible   ${item}
+    Mouse Over   ${item}
     Click Element   ${item}

tests/acceptance/__init__.robot

@@ -6,6 +6,7 @@ https://robotframework-jupyterlibrary.readthedocs.io/en/stable/.
 Documentation     Acceptance tests for jupyter-server-proxy
 Library           JupyterLibrary
 Library           OperatingSystem
+Library           Process
 Suite Setup       Set Up
 Suite Teardown    Clean Up
 
@@ -26,3 +27,4 @@ Set Up
 Clean Up
     Close all Browsers
     Terminate All Jupyter Servers
+    Terminate All Processes