Target search input should have clear button.

[adamschwartz]

https://github.com/EagerIO/EmbedBox/commit/05591c89f68820e9b49b7fbd3830555459bb6ff4

[GirlBossRush]

The input type="search" turned out to have mixed support.

• Mobile Safari lacks a clear button.
• Desktop Safari misaligns the clear button.
• Firefox has no clear button.

A homegrown version should resolve this.

Cheers