Implemented: centralized OMS instance navigation component in dxp-components (#140)

[amansinghbais]

Closes: #140

Short Description and Why It's Useful

Currently all apps used its own code for OMS instance navigation in settings. Here's implemented a centralized OMS instance navigation which can be used by any apps.

• Created a component in dxp-components for the OMS instance navigation.
• Used "goToOms" method of the dxp-component instead of using of app. This also solves 'goToOms' (Go to OMS button does not work in some cases #121).
• Checked the proper working of this implementation in job-manager app.

Steps to verify

• Can verify the proper working of this implementation using job-manager PR raised in Improved: used centralized OMS instance navigation component from dxp-components (#140) job-manager#610
• Review changes of job-manager PR Improved: used centralized OMS instance navigation component from dxp-components (#140) job-manager#610

Screenshots of Visual Changes before/after (If There Are Any)

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Contribution and Currently Important Rules Acceptance

• I read and followed contribution rules