Opening shader graph and saving a file opens steamapps directory

[joshuascript]

Problem: When opening the Shader Graph and saving it navigates to \Steam\steamapps\common\sbox directory instead of the engine filesystem directory.

Severity: Minor

Causes: Only happens when shader graph is opened first. Other tools navigate to their respective folders. Shader graph later will navigate to filesystem, but to the subdirectory of the previous editors directory.

Step-by-step bug replication:
1. Launch editor.
2. Open shader graph, attempt to save, opens steamapps/sbox directory.

Workaround:
1. Navigate to filesystem manually, or open another tool editor such as Model Editor, attempt to save, opens Assets/models in engine directory
2. Re open shader graph, attempt a save, directory will open Assets/models again and user can navigate to their own directory for their shaders.

Implications: Saving outside of filesystem will not register shader causing it to not compile, or properly be in the filesystem.
Error caused - Unable to register asset C:/Users/UserName/Documents/s&box projects/testbed/untitled.shdrgrph