erp5_test_result: fix AttributeError: string_index in TestResult_view/listbox_string_index tales expression

because it is a generic tool and access restriction should be done by API.

test.erp5.testUpgrader.py: update the bt5list in afterSetUp(). Otherwise the user has to invoke genbt5list manually before runnning the test. It was also confusing, because the same test would pass in the server but not locally

Solve divergence dialog was raising unauthorized error when new solver process was created
by this script (when called with someone who was not manager). Therefore use proxy role and
protect call with "View" permission. View is used instead of modify portal content since we could
imagine cases where user might need to solve divergence even though is has no right to modify
delivery.

Improve form.
Add a property sheet for NoteBook line.

Improve UI (sorting).

erp5_data_notebook: Refactor test because mime_type for an invalid image shouldn't be dependent on the filename only

erp5_data_notebook: Add dependency as erp5_base as we would be using portal_type 'Image' in various places

erp5_data_notebook bt5: Rename Base_savePlot to Base_saveImage and add kwargs in parameters for the external function

erp5_data_notebook bt5: Close plot object and after every call to Base_dispalyImage with matplotlib object

erp5_dat_notebook bt5: Add External method base_savePlot and use Image module as context while creating new Image Object in base_savePlot

erp5_dat_notebook bt5: Add Base_savePlot to JupyterCompile extension which would help creating an ERP5 Image object from matplotlib plots

erp5_data_notebook bt5: Rename Base_displayMatplotlibImage to Base_displayImage so as to make it sound more generic

mime_type for results for executed jupyter_code from JupyterCompile extension
has also been defined on the server side itself.

This would help server to have more command over what Content-Type  would be
displayed to jupyter frontend.