UI Fix: Make search button available after device list becomes empty

[astcri]

Problem
The search button becomes unavailable after the device list is empty.

Cause
The _update_button() function receives None when the device list becomes empty, causing the sensitivity of the search button to be disabled if the argument (adapter) is None.

Solution
Pass the instance variable of ManagerDeviceList, Adapter, to the _update_button() function.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[infirit]

@cschramm we should include this in the next stable, I'll open a PR.

@astcri good catch.