list-base: Sort after file-changes

When renaming a file in list-view or grid-view, the renamed file keeps its position (i.e. it isn't re-positioned into the new proper position) until a refresh). There is actually a more generalized problem where file changes on all attributes fail to cause the sort positions to be updated. For example, sorting by date modified and touching a file doesn't cause a re-sort.

The file-changes signal from nautilus-directory, simply gives us the changed files for a given directory, without telling us what was changed so there's not an efficient way of detecting this. We do have a ::end-file-changes signal, that is only emitted once every batch of changes, so let's call nautilus_view_model_sort() then. If no sort changes are required, this will finish quite fast, so it seems like the best alternative.

Fixes: #2568 (closed)