Fix #2671: Showcase store theme in local storage

[melloware]

###Defect Fixes Fix #2671: Showcase store theme in local storage

Added new hook useStorage which can be a drop in replacement for anywhere you use useState. You can choose session or local storage but it defaults to local storage

[mertsincan]

Hi @melloware,

Could you please create a new issue about useStorage? We can add it. I'm waiting for feedback about the showcase issue from @cagataycivici .

[melloware]

OK this PR rebased after the useStorageHook was merged

[mertsincan]

This commit has been manually reverted for now as it causes hydration problems.