Fix the path selector options (#131)

* Remove the incorrect option `data-target-file-type`.
* Set `show_files: false` to display directories only.
* Set changelog URL to Github

Author: ZQyou

form.yml

@@ -72,8 +72,8 @@ attributes:
   working_dir:
     widget: "path_selector"
     label: "Root Directory"
-    data-target-file-type: dirs  # Valid values are: files, dirs, or both
-    readonly: false
+    show_hidden: false
+    show_files: false   # Only display directories
     help: "Select your project directory; defaults to $HOME"
   num_cores:
     widget: "number_field"

manifest.yml

@@ -12,4 +12,4 @@ description: |
   [Cardinal]: https://www.osc.edu/resources/technical_support/supercomputers/cardinal
   [Ascend]: https://www.osc.edu/resources/technical_support/supercomputers/ascend
   [Pitzer]: https://www.osc.edu/resources/technical_support/supercomputers/pitzer
-  [Changelog]: https://www.osc.edu/resources/technical_support/hpc_changelog?keys=jupyter
+  [Changelog]: https://github.com/OSC/bc_osc_jupyter/releases