Giveaway Extractor: fix bug that does not filter giveaways correctly when used in a new tab

[at46]

Description
When using giveaway extractor with entered filters only the first giveaway I enter with the enter button is filtered. The Second, third and so on are not filtered until I disable and re-enable the filter.

Steps to Reproduce

1. you need at least giveaway extractor, enter button and giveaway filter for entered (maybe also new tab for giveaway extractor)
2. configure the filter for giveaway extractor to filter entered games
3. use giveaway extractor e.g. here https://www.steamgifts.com/discussion/qeDja/
4. enter two giveaways

Expected Behavior
Automatically filter all entered giveaways not only the first one.

Console Errors
Promise resolved while context is inactive esgst.js:1

Screenshots

System (please complete the following information):

• ESGST Version: Extension v8.3.17
• Browser + Version: Firefox v68