Backup dlg immediately after upgrading wallet

[concordium-cl]

Description After upgrading to a new version, the user should be prompted to backup. Most current users will be in that situation, without necessarily creating an account immediately after upgrading.

Text and buttons:

Welcome back!

Did you make a backup of your identities and accounts recently?

If you didn’t, now is a good time to do so! Concordium strongly recommends having a backup of all your identities and accounts. 

Left button: Not now Right button: Make backup

Steps to Reproduce

• in old version, create id and account
• upgrade to new version

Expected Result There should be an info box asking the user to make a backup, if he didn't do so in the old version, with two buttons "Dismiss" and "Okay" (leading to export). "Dismiss" should lead to the existing warning "are you sure?".

Actual Result Warning dilaogs and "nagging box" first appear after new account creation.

Versions

• CCD testnet 1.2.1 (64)
• Android
• Huawei 6Ys

[concordium-cl]

@jens-concordium to provide some text.

[jens-concordium]

I updated the description with text, buttons and a screenshot of both.

[jensvesti]

Update from 1.1.0(62) -> 1.2.2(65) shows prompt Update from 1.1.0(62) -> 1.2.3(66) shows prompt Update from 1.2.2(65) -> 1.2.3(66) does not show prompt First time install of 1.2.2(65) or 1.2.3(66) does not show prompt

[concordium-cl]

Tested on testnet.

• Update 1.0.22(61) released version --> 1.2.3(66) newest version: prompt shown ✅ 1.0.16 released version --> 1.2.3(66) newest version: prompt shown ✅ ** 1.0.7 released version --> 1.2.3(66) newest version: cannot be tested as old version cannot be installed, blocked by https://github.com/Concordium/concordium-reference-wallet-android/issues/85

• First time install of 1.2.3(66) does not show prompt ✅

[concordium-cl]

To be retested, depending on blocking issue.

[concordium-cl]

** 1.0.8 version after released version --> 1.2.3(66) newest version: prompt shown ✅