fix(bec-dispatcher): add disconnect_owner method to manage widget slo…

[wakonig]

Description

add disconnect_owner method to manage widget slot disconnections

Related Issues

[Cite any related issues or feature requests that are addressed or resolved by this pull request. Link the associated issue, for example, with fixes #123 or closes #123.]

Type of Change

• Change 1
• Change 2

How to test

• Run unit tests
• Open [widget] in designer and play around with the properties

Potential side effects

[Describe any potential side effects or risks of merging this PR.]

Screenshots / GIFs (if applicable)

[Include any relevant screenshots or GIFs to showcase the changes made.]

Additional Comments

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Definition of Done

• Documentation is up-to-date.

[github-actions]

Benchmark comparison

Threshold: 20% (lower is better).
Result: 0 regression(s), 0 improvement(s) beyond threshold.

No benchmark regression exceeded the configured threshold.

No benchmark improvement exceeded the configured threshold.

All benchmark results

Benchmark	Baseline	Current	Change	Status
BEC IPython client with companion app	5.7537 s	5.93222 s	+3.10%	ok
BEC IPython client without companion app	2.13192 s	2.01379 s	-5.54%	ok
Import bec_widgets	0.0132106 s	0.01365 s	+3.33%	ok
tests/unit_tests/benchmarks/test_dock_area_benchmark.py::test_add_waveform_to_dock_area	0.156049 s	0.142393 s	-8.75%	ok

[codecov]

Codecov Report

❌ Patch coverage is 85.00000% with 6 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
bec_widgets/utils/ui_loader.py	79.31%	4 Missing and 2 partials ⚠️

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