Remove authentication source (e.g. github) from Extension Manager display and search
Squashed from larz/panel-consistency for @larz0
Merge pull request #5143 from adobe/larz/panel-consistency-squashed

Give Find, Replace & linter results tables consistent appearance
Merge pull request #5060 from adobe/nj/issue-4586

Remove authentication source (e.g. github) from Extension Manager display and search