… 35 via SR 1329814

https://build.opensuse.org/request/show/1329814
by user IGonzalezSosa + anag_factory
- Retry requests to the web server if the connection failed
  (gh#agama-project/agama#3096, related to bsc#1257067).

- Configure storage and iSCSI only if needed
  (gh#agama-project/agama#3064).

…3092)

Bring back the iSCSI user interface fully adapted to the HTTP v2 API and
to the latest web client look&feel (https://trello.com/c/S65oeTKz,
private link). It also restores the "Rescan devices" option (related to
https://bugzilla.suse.com/show_bug.cgi?id=1258089, private link).

---

In addition to other minor changes not strictly related to the iSCSI
user interface, during the resurrection of such an interface this PR
introduced few important layout updates to make the Header and
Breadcrumb more flexible and extensible. These adjustments were
necessary to accommodate the placement of the “More storage options”
menu while keeping consistence across other areas of Agama.

For more details, please refer to the relevant commits below.

* [feat(web): add support for sibling menus on breadcrumb
items](374697f)
* [fix(web): pass down all breadcrumb props from
header](6615e32)
* [fix(web): rename InstallerOptions to
InstallerL10nOptions](05b41bd)
* [refactor(web): introduce slots for
Header](f8b601b)
* [fix(web): reduce page title font
size](033e7bc)
* [refactor(web): display Overview options in
sidebar](500cdb6)

---

Related to 

  * #3008
  * #3064

---------

Co-authored-by: David Díaz González <dgonzalez@suse.com>
Co-authored-by: Ancor Gonzalez Sosa <ancor@suse.com>
Co-authored-by: David Díaz <1691872+dgdavid@users.noreply.github.com>

Prepare to release version 19.

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