Data Insights: Remove the store folder

[nairabhishek73]

Let the scehmas folders be visible without needing to click on store

[nairabhishek73]

The parent 'Store' folder should just be replaced with a word, we don't need the folder functionality.
Replace the word 'store' with 'Schemas' and let all the schema folders be listed under it.

[himanshudube97]

@nairabhishek73 Kept the ui same. Changed the store to Schema. No need of clicking on schema to show all the schemas list, they are rendered as soon as we open the Explore page.

Kept the Folder icon in front of Schema. Without it there was empty space left which didn't look good.

[nairabhishek73]

Sorry last change can you rename Schemas to 'Data'

[nairabhishek73]

Also make sure the same changes reflect in the data insights in the UI4T

[himanshudube97]

@Ishankoradia this was the issue.