Set Save button on top, enable it only when devfile changed

[feloy]

What type of PR is this:

/kind feature

What does this PR do / why we need it:

Which issue(s) this PR fixes:

Fixes #6978
Fixes #7003

PR acceptance criteria:

• Unit test

• Integration test

• Documentation

How to test changes / Special notes to the reviewer:

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[odo-robot]

Kubernetes Docs Tests on commit 6c1c8b2 finished successfully.
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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
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No Coverage information
0.0% Duplication

[odo-robot]

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[odo-robot]

OpenShift Tests on commit e189db3 finished with errors.
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[feloy]

/override OpenShift-Integration-tests/OpenShift-Integration-tests

Flaky test

[FAILED] [4.728 seconds]
odo create/delete/list/set namespace/project tests delete project when force-deleting a valid project [BeforeEach] should successfully delete the project synchronously with --wait
  [BeforeEach] /go/odo_1/tests/integration/cmd_namespace_test.go:74
  [It] /go/odo_1/tests/integration/cmd_namespace_test.go:104

[openshift-ci]

@feloy: Overrode contexts on behalf of feloy: OpenShift-Integration-tests/OpenShift-Integration-tests

In response to this:

/override OpenShift-Integration-tests/OpenShift-Integration-tests

Flaky test

[FAILED] [4.728 seconds]
odo create/delete/list/set namespace/project tests delete project when force-deleting a valid project [BeforeEach] should successfully delete the project synchronously with --wait
 [BeforeEach] /go/odo_1/tests/integration/cmd_namespace_test.go:74
 [It] /go/odo_1/tests/integration/cmd_namespace_test.go:104

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