Edit revision clean 2

[Carla-Moz]

This PR closes the following Jira issues:

• PCF-318 In Results view, on edit, the results get appended to the old results instead of replacing them

• PCF-354 Results: The revision(s) need(s) to be preselected in edit mode search dropdown for both base and new revisions

• PCF-356 Results: in edit mode, clicking the cancel button doesn't return to default state after deleting revision(s)

• PCF-357 Results: in edit mode, clicking the save button does not update the state of the revisions correctly

Please look at this commit - e2e2d46 for relevant changes

The relevant files to look at for this review:

src/components/Search/CompareWithBase.tsx
src/components/Search/SearchComponent.tsx
src/components/Search/EditButton.tsx
src/components/Search/SaveCancelButtons.tsx
src/components/Search/SearchResultsList.tsx
src/components/Search/SearchResultsListItem.tsx
src/components/Search/SelectedRevisions.tsx
src/components/Search/SelectedRevisionItem.tsx

src/hooks/useCheckRevision.ts
src/hooks/useSelectedRevisions.ts

src/reducers/SelectedRevisionsSlice.ts

This review implements the "staging", "in progress", and "committed" states of the edit feature where the CompareWithBase handles the state of the selected revisions "in staging" and "in progress". Please look at the comments on this closed PR for reference: https://github.com/mozilla/perfcompare/pull/581

Tests and coverage will be handled in a separate PR.

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (1f35038) 99.34% compared to head (a765ec1) 99.35%. Report is 3 commits behind head on beta.

:exclamation: Current head a765ec1 differs from pull request most recent head e486763. Consider uploading reports for the commit e486763 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## beta #595 +/- ## ======================================== Coverage 99.34% 99.35% ======================================== Files 62 55 -7 Lines 1366 1077 -289 Branches 189 149 -40 ======================================== - Hits 1357 1070 -287 + Misses 9 7 -2 ```

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