Pagination dropdown sometimes is blank

[dominch]

Pagination dropdown sometimes is not usable, whole blank and nothing can be changed,

Also log window is very slow and unresponsive until it ends displaying logs. It takes some time to display whole thing.
When tab is changed those selects are not saved:

[dkapanidis]

These issues have been resolved on 4.2.0

The log options are now saved across tab/page changes and app restarts.
The logs have been redone using canvas instead of HTML for performant reasons.
The show x lines have been replaced by show since x (e.g. 48h) and shouldn't have the above issue anymore.

See #80 for more details.