Copy icon in interactive window should be transparent

[memeplex]

Bug: Notebook Editor, Interactive Window, Editor cells

Steps to cause the bug to occur

1. Set some non-default theme, for example Solarized light
2. Open the interactive window
3. Create a cell
4. Look at the paste icon at the left of the cell:

Actual behavior

The background of the icon doesn't match its surroundings.

Expected behavior

The background is transparent so the icon perfectly blends with the theme background.

Your Jupyter and/or Python environment

Please provide as much info as you readily know

• Jupyter server running: Local
• Extension version: 2020.1.58038
• VS Code version: 1.41.1
• Setting python.jediEnabled: true
• Python and/or Anaconda version: 3.7
• OS: Linux (Ubuntu 19.10)
• Virtual environment: N/A

[IanMatthewHuff]

@memeplex . Thanks for reporting. Looks like that one icon had a fill specified for some reason. I'll clean it up quick.