Change import/export collection on requests page icon

[freitzzz]

Is your feature request related to a problem? Please describe.
I'm fairly new to Postwoman and I was wondering how I could export a collection. I've read README.md and noticed that it was possible, yet I've spent approximately 5 minutes browsing through Postwoman figuring out how to export my collection, and the only way I was able to find it was to search by the 'export' word in the source code. This could be a personal opinion but I think the icon that is currently being used to represent the import/export collection is not delivering the appropriate usability as its illustrative intent is to sort/reverse a list.

Describe the solution you'd like
Change import/export collection icon to one which properly indicates these functionalities or separate the usage of the functionalities by their own icons (e.g. Import use Upload icon and Export Download icon).

Describe alternatives you've considered
Separate the usage of the functionalities by their own icons (e.g. Import use Upload icon and Export Download icon).

Additional context

[liyasthomas]

Fix coming in next commit 👍

[freitzzz]

Thank you! :)