Sanitization of ids in the sync to prevent XSS

Field id was not sanitized in the sync that could result to an XSS attack.

This vulnerability affects the following application versions:

• Jetpack 4.2
• Jetpack 4.2.0
• Jetpack 4.2.1
• Jetpack 4.2.2
• Jetpack 4.2.3
• Jetpack 4.2.4
• Jetpack 4.2.5
• Jetpack 4.3
• Jetpack 4.3.0
• Jetpack 4.3.1
• Jetpack 4.3.2
• Jetpack 4.3.3
• Jetpack 4.3.4
• Jetpack 4.3.5
• Jetpack 4.4
• Jetpack 4.4.1
• Jetpack 4.4.2
• Jetpack 4.4.3
• Jetpack 4.4.4
• Jetpack 4.4.5
• Jetpack 4.5
• Jetpack 4.5.1
• Jetpack 4.5.2
• Jetpack 4.5.3
• Jetpack 4.6
• Jetpack 4.6.1
• Jetpack 4.6.2
• Jetpack 4.6.3
• Jetpack 4.7
• Jetpack 4.7.1
• Jetpack 4.7.2
• Jetpack 4.7.3
• Jetpack 4.7.4
• Jetpack 4.8
• Jetpack 4.8.1
• Jetpack 4.8.2
• Jetpack 4.8.3
• Jetpack 4.8.4
• Jetpack 4.8.5
• Jetpack 4.9
• Jetpack 4.9.1
• Jetpack 4.9.2
• Jetpack 4.9.3
• Jetpack 4.9-pressable
• Jetpack 5.0
• Jetpack 5.0.1
• Jetpack 5.0.2
• Jetpack 5.0.3
• Jetpack 5.1
• Jetpack 5.1.1
• Jetpack 5.1.2
• Jetpack 5.1.3
• Jetpack 5.1.4
• Jetpack 5.2
• Jetpack 5.2.1
• Jetpack 5.2.2
• Jetpack 5.2.3
• Jetpack 5.2.4
• Jetpack 5.2.5
• Jetpack 5.3
• Jetpack 5.3.1
• Jetpack 5.3.2
• Jetpack 5.3.3
• Jetpack 5.3.4
• Jetpack 5.4
• Jetpack 5.4.1
• Jetpack 5.4.2
• Jetpack 5.4.3
• Jetpack 5.4.4