Bug fix for null pointer in line 16 of selector.php

[ehartin]

Before you submit this pull request, please make sure:

• [] Make sure there are links in the PR to the source JIRA card(s) and hubzero ticket(s)
• [] Include a brief summary of the issue in your own words
• [] Include a brief summary of the fix/changed code
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• [] Indicate if the change needs to be hotfixed to any production hubs before a normal core rollout
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Thanks!

This request contains no tickets. It's for a null pointer fix in qubeshub\public\app\plugins\projects\files\views\selector\tmpl\selector.php line 16. File selector within resource page would not appear and show a null pointer error instead on the GUI. After testing with the fix, file selector appears again.

[mdlama]

Hey, Eli. This is an OLD fix you did a pull request on that is not needed anymore -- it somehow got fixed. Thanks!