fixes #170

fixes #30

fixes #252

fixes #210

- you can collapse/expand results and this is preserved
- the "collapse all" action enables once results arrive
- you can remove results and they dont come back at the end of the search
- we do not add the same matches over and over again to the tree, but only once per result

Middle clicking a working file in the working file list should close it and remove it from working files (fixes #56)

fixes #317

Prevent the text selection cursor from showing on .git-statusbar-item. This is
happening because there is an   being used currently to position the
element.

Fixes #307

need to fix layer breakers

Revert "fix build"

This reverts commit 9f5068a2.

Revert "proxy support for extensions"

This reverts commit 612efb5d.