We are not supporting this due to the complexity involved in switching integration managers. We still support custom ones under the hood, just not to the common user. A later sprint on integrations will consider re-adding the option alongside fixing the various bugs out there.
Fixes https://github.com/vector-im/riot-web/issues/10554
Issues fixed:
* Fields were not ~30px from the avatar (too much right margin)
* Tooltips overflowed the dialog on some resolutions
* SetIdServer didn't have an error state for making the field red
* Spacing between sections in Discovery was wrong (fixed by just removing the problematic n+2 selector - it didn't help anything)
