ImportMatricesFromMatlab does not update when external file is modified

[Sumientra]

Describe the bug
If you load a matrix by executing the ImportMatricesFromMatlab module, then you change the input file (outside of SCIRun) and execute the module again, the new/updated file does not get loaded. The module will keep outputting the old data (that is no longer in the file) no matter how many times you execute it. If you load a different file, and then load the first file again, SCIRun will load the new/updated data.

To Reproduce
Steps to reproduce the behavior:

1. Build a network with ImportMatricesFromMatlab module and some other module to show you the contents of the data
2. Select a Matlab file that contains a matrix, execute network, and verify that the data matches your input matrix
3. Change the contents of the matrix in Matlab and save the file
4. Execute the network and verify that the data does not match your new input matrix

Expected behavior
I expect ImportMatricesFromMatlab to load the file every time it is executed and output the current contents of the file.

Version
v5.0-beta.X-642-g5d885369d

Desktop (please complete the following information):

• OS: MacOS
• Version: 10.15.6

[dcwhite]

Across the board in v5, there is no checking for external file modification in any input module. It's just not implemented. The filename would have to change for the module to pick up a state change and re-execute/reread. This will be a bigger feature to get working, so it'll have to wait until next milestone.

[github-actions]

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