Fix/ PC Console - cache data

[xkopenreview]

this pr should add a new config

useCache

to pc console config
when set to true, it should cache in browser indexed db most pc console data so that when user does not need latest data it can load faster.

when user access pc console, cache older than 24 hours are removed.

[melisabok]

1. Could we also include the timestamp of the last loaded data?

2. it looks like the Console still do some API calls, to get the Invited groups, do you know why?
3. The other tabs like "Reviewers Status" is also loading some data
4. When clicking on "Reload", I think we should show a progress icon that shows that is loading otherwise it is hard to see what is happening.
5. What about using the following label for the loaded data?

"Data cached 15 seconds ago"
"Last refreshed: [timestamp]"

I don't have too much data in my environment to test so I would like to merge this and test it with an old conference in the live site. What do you think?

[xkopenreview]

2. it looks like the Console still do some API calls, to get the Invited groups, do you know why?
3. The other tabs like "Reviewers Status" is also loading some data

the invited groups are for the invited group links in overview tab
reviewer status load reviewer profiles

compare to the notes data i think these data (<1M) does not really need to be cached

[melisabok]

What about 1, 4 and 5, are you working on it?

[xkopenreview]

What about 1, 4 and 5, are you working on it?

please take a look at 1b12b4a