Opening file in USS view throws error when the active filter is the file's path

[benjamin-t-santos]

Describe the bug
If you set the active filter in the Zowe Explorer USS view to a file path, and then try to open that file, an error is displayed and the file is not opened.

To Reproduce

1. Open the Zowe Explorer USS view
2. Set the filter to a specific file path (e.g. "/u/user/testdirectory/testfile.txt")
3. Double-click the file to open it
4. Error message is displayed:

z/OSMF REST API Error: Rest API failure with HTTP(S) status 500 category: 1 rc: 8 reason: 9 message: Error executing command. exit_code=1 details: - /bin/chtag -p /u/user/testdirectory/testfile.txt/u/user/testdirectory/testfile.txt - chtag: FSUM6180 file \"/u/user/testdirectory/testfile.txt/u/user/testdirectory/testfile.txt\": EDC5135I Not a directory. (errno2=0x0594003C)

Expected behavior
The file should be opened in the editor, or file paths to files should not be accepted as filters.

Screenshots

Screen.Recording.2024-05-06.at.10.24.35.AM.mov

Desktop (please complete the following information):

• OS: MacOS Sonoma 14.3.1
• Zowe Explorer Version: 2.15.4
• (Optional) Zowe CLI Version:
• (Optional) Are you using Secure Credential Store?

Additional context

I believe it is an issue with the Zowe Explorer USS tree node's fullPath property. It seems like the node is using the active filter as the parent directory, which is in this case is a file and not directory.

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