[ticket/10569] Invalid string comparison in prosilver

Fixing invalid string comparison in ucp_main_front.html in prosilver

PHPBB3-10569
[ticket/10633] Stop leaking filename of attachments when thumbnail is requested

While filenames are chosen at random and there is no correlation between the
original filename and the new filesystem filename, there is a correlation
between filesystem filename and filesytem filename of thumbnails.

Adjust error message to no longer include the physical filename and make it
consistent with the error message that is shown when there is no attachment at
all.

This information was mostly useless for regular users (i.e. non-admins) anyway.

PHPBB3-10633
[ticket/10606] Fix incorrect hidden fields array name in page_header().

Regression from dfb7cc625a37c6345fa647ee3a21f890ba5c9649.

PHPBB3-10606
[ticket/10606] Also correctly use $s_search_hidden_fields in view(forum|topic).

Regression from dfb7cc625a37c6345fa647ee3a21f890ba5c9649.

PHPBB3-10606
[ticket/9084] Don't hide 'non-entered' dropdown CPF value if not required

PHPBB3-9084
Merge remote-tracking branch 'bantu/ticket/10512' into develop-olympus

* bantu/ticket/10512:
  [ticket/10512] Call startup.php from tests/bootstrap.php
Merge remote-tracking branch 'cyberalien/ticket/10569' into develop-olympus

* cyberalien/ticket/10569:
  [ticket/10569] Invalid string comparison in prosilver
  [ticket/10569] Invalid string comparison in subsilver2
Merge remote-tracking branch 'bantu/ticket/10606' into develop-olympus

* bantu/ticket/10606:
  [ticket/10606] Also correctly use $s_search_hidden_fields in view(forum|topic).
  [ticket/10606] Fix incorrect hidden fields array name in page_header().
Merge remote-tracking branch 'bantu/ticket/10633' into develop-olympus

* bantu/ticket/10633:
  [ticket/10633] Stop leaking filename of attachments when thumbnail is requested
[ticket/10639] Do not allow negative post count as rank's minimum posts

PHPBB3-10639
[ticket/10630] Perform array_unique on authors array before creating the query

This is needed to avoid an additional appearance for an author for every
post he made.

PHPBB3-10630
[ticket/10630] Use sql_like_expression() method instead of hardcoded LIKE '%x%'

PHPBB3-10630
[ticket/10456] Add tabindex to subsilver2 captcha

Did not set tabindex on registration page, as the hole page does not have any.

PHPBB3-10456
[ticket/8636] Add resync option to topic_view moderation page

PHPBB3-8636
Merge branch 'ticket/raimon/10453' into develop-olympus

* ticket/raimon/10453:
  [ticket/10453] PM viewmessage page is misplacing the online icon
  [ticket/10453] PM viewmessage page is misplacing the online icon
Merge remote-tracking branch 'nickvergessen/ticket/10630' into develop-olympus

* nickvergessen/ticket/10630:
  [ticket/10630] Use sql_like_expression() method instead of hardcoded LIKE '%x%'
  [ticket/10630] Perform array_unique on authors array before creating the query
Merge remote-tracking branch 'nickvergessen/ticket/10456' into develop-olympus

* nickvergessen/ticket/10456:
  [ticket/10456] Add tabindex to subsilver2 captcha
[ticket/10532] Put $total_match_count assignment onto its own line.

PHPBB3-10532
[ticket/10532] Get rid of inline calculation of $start, remove duplicated check

PHPBB3-10532
[ticket/10532] Remove one unnecessary level of if block nesting.

PHPBB3-10532