[Web] Implement Search snippet in quick search suggestions

[hoangdat]

Description

With the new Search snippet support from jmap, handle search highlight in quick search suggestions.

• If Search snippet for that suggested email is available, which has <mark> element, update style of that <mark> element with current highlight color, and display with HTML widget
• Else keep the current highlight method and display as is.

DoDs

• Implement in quick search suggestions
• Write widget tests confirming expected displaying method