Added escaping in the modules list table to prevent XSS

The module tags were not properly escaped.

This vulnerability affects the following application versions:

• Jetpack 3.0
• Jetpack 3.0.1
• Jetpack 3.0.2
• Jetpack 3.0.2b1
• Jetpack 3.0.2b2
• Jetpack 3.1
• Jetpack 3.1.1
• Jetpack 3.2
• Jetpack 3.2.1
• Jetpack 3.3
• Jetpack 3.3.1
• Jetpack 3.3.2
• Jetpack 3.4
• Jetpack 3.4.1
• Jetpack 3.4.2