Input box briefly fills screen when enering tags in asset upload modal

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Expected Behaviour

When uploading a new asset in the asset modal window, typing a text in the tags input should not cause the screen to flicker.

Actual Behaviour

Input poxes briefly fill the screen, loading class is temporarily applied to selectize-control div.

Steps to Reproduce

1. Add a graphic component
2. Select an asset
3. Upload new asset and type text in the tags input

Versions

• Authoring Tool Version: v0.10.1
• Framework Version: master
• Node.js Version: v10.15.3
• MongoDB Version: v3.6
• Browser: Chrome 78

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Caused by selectize default loading class being applied on user input which is the same as AT app loading class. Also occurs on project settings tags.