feat: Added neutral action to Smooth Alert dialog and updated app review dialog in login page

[Smit56R]

What

• Added neutralAction to SmoothAlertDialog.
• Updated the _showInAppReviewIfNecessary() function in login_page.dart to include the 'Ask me later' button.

Screenshot

Part of

• Merge the 2 distinct "Like this app?" widgets into only one #5038

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 46.15385% with 14 lines in your changes are missing coverage. Please review.

Project coverage is 9.54%. Comparing base (4d9c7fc) to head (234c716).
Report is 36 commits behind head on develop.

Files	Patch %	Lines
...p/lib/generic_lib/dialogs/smooth_alert_dialog.dart	57.14%	9 Missing ⚠️
...ooth_app/lib/pages/user_management/login_page.dart	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5086      +/-   ##
==========================================
- Coverage     9.54%   9.54%   -0.01%     
==========================================
  Files          325     327       +2     
  Lines        16411   16517     +106     
==========================================
+ Hits          1567    1576       +9     
- Misses       14844   14941      +97     

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[monsieurtanuki]

Thank you @Smit56R for your first PR!

There is a slight misunderstanding that you'll have no problem fixing:

• the point of adding a neutral button is only to have another horizontal or vertical button - please forget the "one button on top and two buttons on the bottom" option and just implement 3 buttons in a row or 3 buttons in a column
• the point of "merging" the versions was mainly to reuse the same labels - the goal is to have the same 3 options with the same 3 labels when we ask our "do you like this app?" question.

As in the following screenshot:

Therefore please make sure that in the login page we use vertically the following labels:

• tagline_app_review_button_positive
• tagline_app_review_button_negative
• tagline_app_review_button_later

[Smit56R]

@monsieurtanuki Got it. I will make the changes and update the PR.

[Smit56R]

@monsieurtanuki I have updated the PR with the changes requested.

[monsieurtanuki]

Looks good to me @Smit56R! Congratulations!

[Smit56R]

Thank you @monsieurtanuki! You have been so polite.

[monsieurtanuki]

@Smit56R For the record I don't understand the 2 screenshots, vertical and horizontal.
Maybe I've missed something but the goal of this PR is only the vertical version, and we need to be sure that the login page will display the buttons vertically.
I guess the idea was just to say "by the way the PR also includes a possibility of displaying 3 buttons horizontally, mainly for code coherence reasons, but not to be used in that particular "love this app?" case and probably never, as 3 horizontal buttons would be a bit packed".
Thanks for the PR anyway ;)