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In the Header, a back arrow Icon Button displays. Clicking this back icon button will go back to the main Channel Info panel.
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Pinned Messages Subpanel
The Pinned Messages panel is the same as it currently, except for the fact that it will now be a subpanel of the main channel info panel. Pinned Messages can be accessed from the Channel Header Icon Button or from the new Channel Info RHS menu item.
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Files Subpanel
The Channel-specific Files panel is the same as it currently, except for the fact that it will now be a subpanel of the main channel info panel. Files can be accessed from the Channel Header Icon Button or from the new Channel Info RHS menu item.
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Sample of how
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Subpanels behave
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