Use Material icons
To have a complete look and feel of the client, I am proposing:
For action "Go to record":
http://commons.wikimedia.org/wiki/Image:Go-jump.svg
For action "View log":
http://commons.wikimedia.org/wiki/Image:Text-x-generic.svg
For action Previous/Next Tab:
best would be something like
http://commons.wikimedia.org/wiki/Image:Gnome-folder.svg
with arrows
but perhaps just take other arrows:
http://commons.wikimedia.org/wiki/Image:Gnome-go-previous.svg
http://commons.wikimedia.org/wiki/Image:Gnome-go-next.svg
or:
http://commons.wikimedia.org/wiki/Image:Media-seek-backward.svg
http://commons.wikimedia.org/wiki/Image:Media-seek-forward.svg
For action Import data:
http://commons.wikimedia.org/wiki/Image:Gnome-view-restore.svg
or
http://commons.wikimedia.org/wiki/Image:Mergefrom-3.svg