add save_formset to ScriptAdmin

[Lioscro]

Add save_formset method to ScriptAdmin so that when script versions are added from the inline table, the created_by and modified_by fields get set appropriately.

[codecov-commenter]

Codecov Report

Patch coverage: 12.50% and project coverage change: -0.11% :warning:

Comparison is base (d6b2a4b) 77.12% compared to head (38a061b) 77.02%. Report is 1 commits behind head on master.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #389 +/- ## ========================================== - Coverage 77.12% 77.02% -0.11% ========================================== Files 139 139 Lines 4827 4835 +8 Branches 643 646 +3 ========================================== + Hits 3723 3724 +1 - Misses 962 969 +7 Partials 142 142 ``` | [Flag](https://app.codecov.io/gh/wooey/Wooey/pull/389/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wooey) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/wooey/Wooey/pull/389/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wooey) | `76.98% <12.50%> (-0.11%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wooey#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files Changed](https://app.codecov.io/gh/wooey/Wooey/pull/389?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wooey) | Coverage Δ | | |---|---|---| | [wooey/admin.py](https://app.codecov.io/gh/wooey/Wooey/pull/389?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wooey#diff-d29vZXkvYWRtaW4ucHk=) | `75.00% <12.50%> (-9.62%)` | :arrow_down: |

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