fix: fixed sidebar z-index #2672

Job	Run time
get-cypress-tests	9s
cypress-run (cypress/e2e/admin/topics.cy.ts)	6m 39s
cypress-run (cypress/e2e/admin/signin.cy.ts)	7m 25s
cypress-run (cypress/e2e/addContent/addTweet.cy.ts)	7m 5s
cypress-run (cypress/e2e/addContent/addWebpage.cy.ts)	7m 21s
cypress-run (cypress/e2e/addContent/addSource.cy.ts)	6m 20s
cypress-run (cypress/e2e/addContent/addYoutube.cy.ts)	7m 25s
cypress-run (cypress/e2e/addNode/addNodeType.cy.ts)	8m 48s
cypress-run (cypress/e2e/sourcesTable/sourcesTable.cy.ts)	6m 24s
cypress-run (cypress/e2e/createGeneratedEdges/createGeneratedEdges.cy.ts)	6m 20s
cypress-run (cypress/e2e/trendingTopics/trendingTopics.cy.ts)	8m 9s
cypress-run (cypress/e2e/checkEnv.cy.ts)	6m 22s
cypress-run (cypress/e2e/curationTable/curation.cy.ts)	6m 18s
cypress-run (cypress/e2e/seeLatest/latest.cy.ts)	8m 21s
	1h 33m 6s

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