I see a lot of complaints on the forum about missing Amber features in the default client related to items manipulation based on quality. But for me the problem is that they are based on hotkeys and help to solve problems in a very odd way. Like when I want to find an item with highest quality I don't need to sort them each time. When I transfer items with the same quality I might want to transfer multiple stacks of similar but not equal quality. Again usually with lowest or highest. For me I solved this problem by adding a new extended widget inventory with a list of items along to regular grid. I think it would be a good idea to have something like this in the default client. There are still open questions:
* Do I wan't to apply use action to only one item or all in the stack?
* How to group/show containers with content?
* How to group/show stacks of seeds?
Here are some examples:
Feature as I use it now is implemented and described in more details here:
https://github.com/dolda2000/hafen-client/pull/14.