Thanks for that helpful reply. I will just live with the file manager tab I think.
As for the standby issue, I was thinking the same as you as went hunting in the BIOS for any stanby power controls. I tried a couple of things but they didn't make any difference. Strangely it is ok as long as I plug the AC power back in before bringing it out of standby. Linux Mint sounds good but I have thr broadcom card so that rules that out unfortunately.
Let's hope Dell continue to develop this and iron out the last few little bugs.