Add move to next unread Label on mark as read. (#6886)

* Add move to next unread Label on mark as read.

The Labels, unlike the Feeds and Categories, don't move to the next
unread when "move to next unread on mark all as read" user feature is
enabled.
Labels are more complex than Feeds and Categories because Entries can be
in more than Label at a time. So when marking all Entries in the Label
as read, it can cause other Labels to end up with all their Entries
marked as read as well. The calculation of what the next
Label/Feed/Category is to jump to normally happens when generating the
link for the "Mark as Read" buttons, but it can't for Labels.

To address the problem for Labels, use a placeholder value during the
pre-calculation of the "Mark as Read" button link. When that placeholder
value is encountered during the "Mark as Read" action, the next Label
with unread Entries will be calculated immediately after the mark as
read action has been processed.

Fix all the translations of the 'jump_next' text to remove the '(feed or
categories' part that no longer applies.
Attempt to fix the inconsistent Russian, Italian, and Polish
translations of 'jump_next' text, which phrased the '(feed or
categories)' part differently.

* Minor code formattting

* Fixes

* Optimize next label lookup.

Only get the tag list once, and actually error check that it returned successfully.
Fix a typo in a comment as well.

* Fix fallback when all Labels are read.

Fix the missing check for whether we're in the fallback case or not.

* Update app/i18n/ru/conf.php

* Update app/Controllers/entryController.php

* Minor changes

* One more minor

---------

Co-authored-by: Alexandre Alapetite <alexandre@alapetite.fr>

1 files changed, 1 insertions, 1 deletions

diff --git a/app/i18n/oc/conf.php b/app/i18n/oc/conf.php
index dcdbf2ff2..2e2afa73d 100644
--- a/app/i18n/oc/conf.php
+++ b/app/i18n/oc/conf.php
@@ -220,7 +220,7 @@ return array(
 		),
 		'hide_read_feeds' => 'Rescondre las categorias & fluxes sens articles pas legits (fonciona pas amb la configuracion « Mostrar totes los articles »)',
 		'img_with_lazyload' => 'Utilizar lo mòde “cargament tardiu” pels imatges',
-		'jump_next' => 'sautar al vesin venent pas legit (flux o categoria)',
+		'jump_next' => 'sautar al vesin venent pas legit',
 		'mark_updated_article_unread' => 'Marcar los articles actualizats coma pas legits',
 		'number_divided_when_reader' => 'Devisat per 2 dins la vista de lectura.',
 		'read' => array(