[explorer] fix: search namespace without dash

[AnthonyLaw]

What was the issue?

• when the user searches the namespace containing -, it not working in explorer, the reason is that the search box is defaulted removed -.
• we used to removed - to prevent the address with a dash.

What's the fix?

• we will keep the - in the search box because the namespace allows the string contain a dash.
• we no longer use - in our address format (for example wallet), so it won't affect address search.

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