Polish the bottom panel UI

[nnecla]

This pr is to make some small polishes in the query results bottom panel. with these changes:

• The icon button is removed from the collapsible component, as well as making the collapsible item accessible via keyboard.
• Solving a small render issue, in which queryVisualization view was not rendered before posting a message from queryDetails part.(to reproduce the bug, collapse the queryVisualization view, restart the vscode, and run a query while queryVisualization is still collapsed.)
• Polishing the table view to make it as similar as possible to the query experience with little effort 🙈
• Making sure that the focus is kept in the editor if query results is already rendered
• Making sure that theme changes are reflected from the bottom panel without requiring a restart.

[changeset-bot]

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Latest commit: 1bd17e5

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