I agree with ArgandGauss, this would be a nice feature.
And another nice feature would be to automatically add units to the defending army.
Looking forward to the multiacc feature.
and I think the tab switching problem is related to failed logins, but it doesn't always happen.
I will keep an eye on it and tell you if I found something.
edit:
It seems to always happen, when the program hides the UI and only shows the login window. After the login window disappeared due to a successful login, the UI shows up the with first tab open.
I'd suggest to save which tab was selected before doing a relog and reselecting the tab after the relog.
Another feature I thought about would be a new tab which automatically calculates when when exactly you will have xx gold, xx supplies or xx stones/wood/...
Or a calculator that calculates how many of which houses you should buy to get the max gold over time and still have enough population.
Hmm and what about automatically buying new fp..
Thinking about all the possible features it would be a good idea to create a scriptable interface.
Lua for example is a great and simple language for cases like this.