Improv. 18 - 2: Load Params button.

[neojavan]

Issue: 2
Parameters do not load correctly if the file to be loaded is from a run that contained only 1 variable.

Steps that reproduce the error:

1. Perform a run using tmean with a weight of 1 as the only parameter
2. Save parameters
3. Close and reopen webpage and load parameters from the previously saved run
   What you expect to see:
   The previous run reloaded (i.e. tmean with a weight of 1 as the only parameter)
   What you see instead:
   Tmean loads with a weight of 1, however prec also loads with a weight of 0.5

Required action:

1. Identify if the coding for the Load Params button still exists
2. Solve the above issues
3. Re-enable the Load Params button
   Benefits:
   Users can load parameters from previous runs to save time and reduce errors when making multiple analyses.
   May also be useful when giving tutorials to allow users to run pre-made examples.