Update error.php

<?php if ((!$statusFixed) && ($this->countModules('status'))) : ?>
needs to be changed by
<?php if ((!$statusFixed) && ($this->getInstance()->countModules('status'))) :?>

$this is, at that point, instantiated to JDocumentError which has not countModules method throwing an error.
Add valid_elements option to TinyMCE plugin
Fix wrong results returned by isEnabled

When language filter plugin is disabled and language filter is enabled in code using JFactory::getApplication()->setLanguageFilter(true) calling JLanguageAssociations->isEnabled causes notices and fatal errors and returns wrong result if item associations are in fact disabled.

What happens is that JPluginHelper::getPlugin returns empty array when certain plugin is disabled and since there is no params to be passed to JRegistry and $enabled gets default value.
Use Exceptions for catching DB errors
Filter unpublished content items from search results.
Missing object property "language".
Update modal.php

Fixed broken Link for com_categories extensions with a section (e.g. option=com_categories&extension=com_foo.bar)
[bug] [33413] Cannot upload file to sub-folder in Media Manager in back end
Close #3575
[bug] [32957] Removing doubled description tab in template styles
Close #3049
[bug] [33625] Replace "bootstrap_size":"1" with "bootstrap_size":"0"
Close #3470
[bug] [33600] Remove validate-jquery-uncompressed.js
Close #3426
[imp] [32323] Removes excessive padding-top on the body element when the viewport is at 738px wide
Close #2650
[#32862] Removed // comments from bootstrap css.

The // comments are not intended to be present in the css files.  They are
only present in the .less files to identify changes from standard bootstrap.
Removing behavior.framework call from category layouts
Adding behavior.core to grid.sort since it relies on core.js being loaded.
Using "joomla.content.icons" JLayout for article and feature view
Moving the part to show fieldset descriptions from fieldset layout to params layout
Adding cy_GB (Welsh) language to installation
Add link to coding standards to contributing.md
Close #3593
Merge pull request #3584 from pjwiseman/32862

[#32862] Removed // comments from bootstrap css.