fix: token input + connect button default styles

[gabitoesmiapodo]

Closes #263 Closes #267

Description:

• Updated TokenInput's default CSS styles.
• Updated ConnectButton's default CSS styles.

TokenInput looked like this by itself:

Now it looks like this:

Type of change:

• [ ] New feature
• [ ] Bug fix
• [ ] Breaking change
• [x] Enhancement
• [ ] Refactoring
• [ ] Chore

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