Treebrowser has "open with glade" feature for .ui and .glade files in this fork. Tested on Ubuntu 16.04 LTS 64 bit and Windows 10 64bit (msys - mingw64). You can view, comment on, or merge this pull request online at:
https://github.com/geany/geany-plugins/pull/789
-- Commit Summary --
* open with glade feature for .ui and .glade files
-- File Changes --
M treebrowser/src/treebrowser.c (36)
-- Patch Links --
https://github.com/geany/geany-plugins/pull/789.patch https://github.com/geany/geany-plugins/pull/789.diff