Script upload

[will-moore]

This PR allows webclient to upload official scripts using a UI similar to Insight's.

To test:

• Login as Admin. Currently any Admin will see the "Upload Script" option in scripts menu. Do I need to check privileges for Light Admins?
• Click the "Upload Script" option - launches dialog. Can choose local file to upload. No validation of file extension yet.
• Choose a script path from the options. Also try to type one in.
• The message should tell you whether you are uploading or replacing the script. Try both.
• On submit, the script should upload and you'll see a success dialog.
• On click "OK" the window should close and showing script menu in webclient should include your script.

[mtbc]

Yeah, there are relevant WriteScriptRepo and DeleteScriptRepo privileges.

[jburel]

Upload the script via the UI under omero/figure_scripts as indicated in the README of figure.

# Create a dict we can use for scalebar unit conversions
unit_symbols = {}
unit_names = [
    "PICOMETER", "ANGSTROM", "NANOMETER", "MICROMETER", "MILLIMETER",
    "CENTIMETER", "METER", "KILOMETER", "MEGAMETER"
]
for name in unit_names:
    klass = getattr(UnitsLength, name)
    unit = LengthI(1, klass)
    to_microns = LengthI(unit, UnitsLength.MICROMETER)
    unit_symbols[name] = {
        'symbol': unit.getSymbol(),
        'microns': to_microns.getValue()
    }

This is correct. This is the new content of the script

[jburel]

Having feedback during the upload will be great. a wheel spinning or such like
Currently no feedback only a greyed out button

[jburel]

Tested the "replace script" option. This works too

[will-moore]

@jburel Improved the UI when uploading. Show spinner and disable form inputs.

[dominikl]

That's great, that's what people were asking for at the Edinburgh workshop too.

[jburel]

We will probably need to offer the ability to move scripts around
if for example it is put in the wrong location, easy mistake
or even remove a script

[jburel]

The text field where the location of the folder is added to is not disabled

[jburel]

Choose folder is not disabled

[jburel]

Cancelling during the upload does not actually cancel it so this is misleading

[jburel]

Rename the button to close instead of cancel

[will-moore]

That last commit allows you to see any ValidationException (e.g. Syntax Error in the script).

[joshmoore]

./omeroweb/webclient/views.py:4525:57: E128 continuation line under-indented for visual indent
2031./omeroweb/webclient/views.py:4531:5: E303 too many blank lines (2)

[jburel]

I tried to upload an invalid file (pdf). This was correctly not allowed. An error message pops up
but the upload button stays greyed out with the message uploading and the spinner is there do.
I have to close and start again

[will-moore]

If user chooses non .py file (e.g. pdf) they will see:

[jburel]

Restriction is now in place
If the file is not a valid script, an error is returned.
The dialog is closed when ok is pressed. This is a bit abrupt.
Probably good enough for a first round

[jburel]

Tested with light-admin with upload script on: works fine
Tested with light-admin with upload script off: The user cannot upload, It will be better to have the option hidden in that case