[ticket/13104] inline-block -> block

PHPBB3-13104
Merge pull request #2996 from Senky/ticket/13104

[ticket/13104] Responsive tabs display bug in IE11
[ticket/13113] Updates the base url only when the front-end isn't app.php

PHPBB3-13113
Merge pull request #3001 from Nicofuma/ticket/13113

[ticket/13113] Updates the base url only when the front-end isn't app.php
[ticket/13117] Correctly define auto increment columns as "NOT NULL" on mysql

Unintended change from 95ab4b3e931521ce3c56068478311f0c04f713cc

PHPBB3-13117
[ticket/13118] Correctly use the provided datetime class

PHPBB3-13118
Merge pull request #3003 from nickvergessen/ticket/13117

[ticket/13117] Correctly define auto increment columns as "NOT NULL" on mysql
Merge pull request #3007 from nickvergessen/ticket/13118

[ticket/13118] Correctly use the provided datetime class

* nickvergessen/ticket/13118:
  [ticket/13118] Correctly use the provided datetime class