PCHR-4098: Misc BackstopJS fixes and improvements

[AkA84]

This PR contains miscellaneous improvements and fixes to CiviHR's backstopjs set up

Updating to latest stable BackstopJS version

Update BackstopJS to the beta version, currently v3.5.0. The rationale behind this decision is the same as the one described here

Using the beta version caused an issue in which a node package was not properly installed when running npm i in the civihr root, thus causing gulp commands to not execute

I couldn't find the reason for it, so instead of using the beta version I used the latest stable version (v3.5.2). It doesn't contain the improvement that the beta contains, but it's at least stable

Fixed AngularJS urls

After #2790 , the format of urls of angular apps have changed, for example:

- /civicrm/tasksassignments/dashboard#/tasks
+ /civicrm/tasksassignments/dashboard#!/tasks

- /manager-leave#/manager-leave/requests
+ /manager-leave#!/manager-leave/requests

which broke BackstopJS scenarios where we used those urls directly

{
  "label": "SSP / My Leave / Report",
  "url": "{{siteUrl}}/my-leave#/my-leave/report"
}

This PR fixes the urls

Fixed selector for edit my details button

The worked done in as part of compucorp/civihr-employee-portal#520 changed the href value of the "Edit my details" button,

- [href="/my_details/nojs/view"]
+ [href="/edit-my-personal-details/js/view"]

which resulted in the "SSP / Edit My Details" as its script relied on the value of href, and didn't get updated. The PR fixes the issue by updating the selector

[igorpavlov-zz]

Please remove the enhancement and add a bug label, since you say this PR "fixes" something.

[igorpavlov-zz]

You update BS to 3.5.0, could you please mention that in the PR desc?

[igorpavlov-zz]

The PR description is misleading. You specify version 3.5.0 too prominently, in the header, so if someone skims the PR, they may miss the point that it is actually 3.5.2 version that is used. Thus I suggest the following desc structure:

[h1]Upgrade BackstopJS  to v3.5.2[h1]

Initially in this PR BackstopJS was updated to the Beta version (currently v3.5.0). The rationale behind this decision is the same as the one described [here]

However, using the beta version caused an issue in which a node package was not properly installed when running `npm i` in the civihr root, thus causing gulp commands to not execute

I couldn't find the reason for it, so instead of using the beta version I used the latest stable version (v3.5.2). It doesn't contain the improvement that the beta contains, but it's at least stable.

[igorpavlov-zz]

Please update the PR desc as suggested above or suggest our own version that addresses the issue described above.