fix: Panel focus throwing an exception

[mofojed]

• Just pass the instance of Panel in if componentPanel is null
• We'll need to do something else to wire up tables to linker

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (a260842) 46.68% compared to head (3d26d09) 46.67%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1609      +/-   ##
==========================================
- Coverage   46.68%   46.67%   -0.02%     
==========================================
  Files         583      583              
  Lines       36267    36255      -12     
  Branches     9074     9073       -1     
==========================================
- Hits        16933    16921      -12     
  Misses      19282    19282              
  Partials       52       52              

Flag	Coverage Δ
unit	46.67% <83.33%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
.../dashboard-core-plugins/src/WidgetLoaderPlugin.tsx	100.00% <ø> (ø)
...ckages/dashboard-core-plugins/src/panels/Panel.tsx	69.67% <100.00%> (-0.77%)	⬇️
.../dashboard-core-plugins/src/panels/WidgetPanel.tsx	54.23% <ø> (ø)
packages/dashboard/src/DashboardPlugin.ts	18.18% <ø> (ø)
packages/dashboard/src/layout/LayoutUtils.ts	13.94% <50.00%> (ø)

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