Using variant="fab" is deprecated

[martinfrances107]

look at console output in response to our landing page [ in Chrome's dev tools ]

http://localhost:3000/

I see this deprecation notice ( see below )

When I grep around for the problem I see this

 grep -R 'variant="fab' 
src/components/05_pages/Content/Content.js:                variant="fab"
src/components/05_pages/TaxonomyTermsOverview/TaxonomyTermsOverview.js:          variant="fab"
src/components/02_atoms/Widgets/FileUploadWidget.js:                              variant="fab"
src/components/02_atoms/MultipleFields/MultipleFields.js:                    variant="fab"

Here is a link to the button API -- which has the associated deprecation notices

https://material-ui.com/api/button/

I will try and find the time to work on this next week.

index.js:1437 Warning: Failed prop type: Material-UI: the `fab` variant will be removed in the next major release. The `<Fab>` component is equivalent and should be used instead.
    in Button (created by WithStyles(Button))
    in WithStyles(Button) (at Content.js:313)
    in div (at Content.js:174)
    in div (created by Paper)
    in Paper (created by WithStyles(Paper))
    in WithStyles(Paper) (at Content.js:171)
    in div (at Content.js:168)
    in Content (created by Connect(Content))
    in Connect(Content) (created by Route)
    in Route (created by withRouter(Connect(Content)))
    in withRouter(Connect(Content)) (created by Route)
    in Route (at App.js:125)
    in Switch (at App.js:124)
    in ErrorBoundary (at Default.js:110)
    in main (at Default.js:109)
    in div (at Default.js:57)
    in Default (created by Connect(Default))
    in Connect(Default) (created by Route)
    in Route (created by withRouter(Connect(Default)))
    in withRouter(Connect(Default)) (at App.js:123)
    in Router (created by ConnectedRouter)
    in ConnectedRouter (at App.js:122)
    in Provider (at App.js:121)
    in ErrorBoundary (at App.js:120)
    in MuiThemeProviderOld (at App.js:119)
    in JssProvider (at App.js:118)
    in App (at src/index.js:24)