Additional sliding sync enhancements

[Just-Insane]

Description

This PR resolves some additional sliding sync bugs (and potential future bugs), and also implements a lower-churn sync state, especially for limited network/lower power devices such as phones (where supported). This is set dynamically based off of information provided to the app about things such as network quality, if it is a mobile device, and if the network is set to reduce data usage. It also adds some additional diagnostic information in the developer tools section that exposes the information above.

Fixes #

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings