Would it also be possible to have a previous and next button so for example, if I open quote 10, I could click previous for quote 9 or next for quote 11 instead of having to go back and then open whatever. However, the previous and next must be able to open the previous or next quote/invoice that is filtered - so if you are filtering for client A, then open the first invoice, you should be able to click next for the next invoice of that filtered client.
This has been suggested before. The problem is there can be many ways to get to the same page in Manager. A Next or Previous button could refer to any of those. Search the forum for the previous topics.