fix(LogTable): implement virtual scrolling

[Antreesy]

Attempt to implement 'virtual scrolling':

• copied from server/apps/settings/src/components/Users/VirtualList.vue, omitting some redundant logic for logreader

TODO:

• expanded LogTableRow is taking more vertical space, but doesn't seem to break scroller in general, and atm collapses after new scroll event

[ShGKme]

Implementing virtual scrolling is possible, but it is not something simple. A proper raw implementation would be about 300 - 500 more lines.

We do it in the files list in the Files app and then in the accounts table in settings.

Here the only problem is the table layout.

I'd try:

1. Check if we can use vue-virtual-scroller + display: contents to make div wrappers "invisible" for the tree in the table.
2. We can fork vue-virtual-scroller to add missing features like containers tag.
3. Use useVirtualList from vueuse. It might not work well with its default styles, but with constant height we can easily reuse it with translateY instead of marginTop.
4. Copy implementation from server

[Antreesy]

Copy implementation from server

Accounts table implementation looks more fitting, so I take over logic from it. Probably need some more style adjustments, but atm looks decent and works fine performance-wise.

cc @Pytal for input as author of original commit