Upgrade multiple wall sections at one time

Hello,

I'm about to upgrade my TH to level 9. While I'm excited about the 25 new wall section I will be getting access to, I'm not looking forward to having to upgrade each wall section individualy through all the levels. The 50 sections from a new TH 8 were brutal. If my values and math are correct, then it costs 405,000 gold to upgrade 25 wall section from levels 1 to 4. That does not seem like an outrageous amount of gold to have on hand at any time for someone with a new TH 9.

Could you add a feature to allow users to upgrade ROWS of walls? Users could select a wall section, select "Select Row", and then next to "Rotate Row" there could be an "Upgrade Row" option? It could save a lot of repetitive tapping.

Thanks for your consideration.

This needs to be added and I don't know why it hasn't already.

I vote for this!

This is so smart, why this isn't part of the game already I don't know.