Closes #2884 Upgrade plan link in admin bar

[remyperona]

Description

Fixes #2884

Add an upgrade plan link in the admin bar for free users with quota < 20%

Type of change

• Enhancement (non-breaking change which improves an existing functionality).

Detailed scenario

• Free account with more than 20% quota remaining
• Display the imagify admin bar sub-menu
• Upgrade plan link is displayed
• Clicking on link opens the subscription popup

Technical description

Documentation

Display the button if free user and quota > 20%

Mandatory Checklist

Code validation

• I validated all the Acceptance Criteria. If possible, provide screenshots or videos.
• I triggered all changed lines of code at least once without new errors/warnings/notices.

Code style

• I wrote a self-explanatory code about what it does.
• I protected entry points against unexpected inputs.
• I did not introduce unnecessary complexity.

[Mai-Saad]

@Tabrisrp Thanks for the PR.

• currently, the upgrade plan link is displayed when the remaining quota for the starter (free) user is <= 20% ==> It shall be displayed when the free account has a remaining quota > 20%. Can you please check? 🙏 (confirmed with @marija-nikolic )
  

• if we click the upgrade link, we will have an empty loading popup. can you please check 🙏 or let us know if anything needs to be done so popup data is displayed
  

[marija-nikolic]

I've noticed there is a mistake here. If we have a pink banner displayed, we don't need a green "Upgrade plan" button.
You have details on this Notion page

I've just discussed it with Mai.

[marija-nikolic]

@Tabrisrp @Mai-Saad Did we fix this issue here with having both upgrade options (green and pink)?

[Mai-Saad]

@Tabrisrp @Mai-Saad Did we fix this issue here with having both upgrade options (green and pink)?

Yes can see it fixed now

• upgrade link
  

• popup after clicking link still keeps loading with me, @Tabrisrp can you please add screenshot of popup
  

[wordpressfan]

Do we need to build the minified assets here?
We tried this PR in our test site and when SCRIPT_DEBUG equals false we see:

and once we set it to true, we see:

That's why I think we need to build assets.

[remyperona]

Updated the JS min file that was missing

[Mai-Saad]

• upgrade style is good now while script_debug is false
  
  

• The banner is displayed when click upgrade (the new banner is in another PR as per @Tabrisrp )