fix: Cannot read property 'amount_inquired' of null #585

[sKiLdUsT]

• Closes Cannot read property 'amount_inquired' of null #585

[sKiLdUsT]

After some investigation, issue #585 only occurs if there is a cancelled shared payment request (bunq receipt splitter feature from update 15) present somewhere in the dataset. Since bunqMeTab.bunqme_tab_entry doesn't get populated in this case, my workaround first creates the necessary variables with null values and only fills them with the actual request data if present. There might be a more elegant way to do this, but this at least get's the app working again.