Description:
When loading a Keynote presentation in headless mode it's not possible to access it with internal PyUno script.
Keynote in non-headless mode works fine.
ODP in headless mode works fine.

Steps to Reproduce:
1. create test.py internal python script with a function that get the current component and print it to the console.
Script location under Ubuntu:
/usr/lib/libreoffice/share/Scripts/python/test.py
test.py script content:
def test():
  desktop = XSCRIPTCONTEXT.getDesktop()
  cmp = desktop.getCurrentComponent()
  print(cmp)

2. Execute the script with a Keynote presentation:
libreoffice --headless 'vnd.sun.star.script:test.py$test?language=Python&location=share' test.key

3. None is printed to the console instead of the component object.

4. Test without headless mode:
libreoffice 'vnd.sun.star.script:test.py$test?language=Python&location=share' test.key

5. Verify the component object is printed to the console.

6. Execute the script with ODP presentation:
libreoffice --headless 'vnd.sun.star.script:test.py$test?language=Python&location=share' test.odp

7. Verify the component object is printed to the console.

Actual Results:
None is printed to the console. We can't access the Current Component.

Expected Results:
We should be able to access the Current Component and print it to the console.


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 6.3.2.2
Build ID: 1:6.3.2-0ubuntu0.18.04.1~lo1
CPU threads: 1; OS: Linux 5.0; UI render: default; VCL: gtk3; 
Locale: en-US (en_IL); UI-Language: en-US
Calc: threaded