Bail from cleaning meta query clause when it's not an array.

Later isset() checks on string values were causing notices on PHP < 5.4.

Props jorbin.
See #29642.
Built from https://develop.svn.wordpress.org/trunk@29941


git-svn-id: http://core.svn.wordpress.org/trunk@29692 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: Fix hover and focus style for links in content with custom color schemes.

Props iamtakashi, fixes #29978.

Built from https://develop.svn.wordpress.org/trunk@29942


git-svn-id: http://core.svn.wordpress.org/trunk@29693 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: Removing unused custom color controls.

Props cainm, fixes #29982 and #29959.


Built from https://develop.svn.wordpress.org/trunk@29944


git-svn-id: http://core.svn.wordpress.org/trunk@29694 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Invalidate cache for child terms when parent term is deleted.

Props socki03.
Fixes #29911.
Built from https://develop.svn.wordpress.org/trunk@29945


git-svn-id: http://core.svn.wordpress.org/trunk@29695 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: correct escaping to render HTML in no-content admin message.

Props dmchale, fixes #30011.

Built from https://develop.svn.wordpress.org/trunk@29947


git-svn-id: http://core.svn.wordpress.org/trunk@29696 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Customizer: Introduce `customize_preview_$setting->type` action to handle multiple settings of the same type.

props celloexpressions.
fixes #29165.
Built from https://develop.svn.wordpress.org/trunk@29948


git-svn-id: http://core.svn.wordpress.org/trunk@29697 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: centre gallery thumbnails

Props iamtakashi, fixes #30019


Built from https://develop.svn.wordpress.org/trunk@29949


git-svn-id: http://core.svn.wordpress.org/trunk@29698 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Customizer: Extract content markup for panels to its own method, `WP_Customize_Panel::render_content()`.

This allows to override the behavior of a panel, or even to completely replace its contents with something other than controls or sections.

props celloexpressions.
fixes #29324.
Built from https://develop.svn.wordpress.org/trunk@29950


git-svn-id: http://core.svn.wordpress.org/trunk@29699 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: Swap order of description and caption so the caption is underneath an image on image attachment pages.

Props iamtakashi, fixes #30020.


Built from https://develop.svn.wordpress.org/trunk@29951


git-svn-id: http://core.svn.wordpress.org/trunk@29700 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove redundant table alias check in WP_Meta_Query.

Also adds documentation for 'meta_query_find_compatible_table_alias' filter.

See #24093.
Built from https://develop.svn.wordpress.org/trunk@29953


git-svn-id: http://core.svn.wordpress.org/trunk@29701 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Customizer: Use correct panel-back icon in RTL.

props TomHarrigan.
fixes #29946.
Built from https://develop.svn.wordpress.org/trunk@29955


git-svn-id: http://core.svn.wordpress.org/trunk@29702 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add ID attribute to style element from wp_add_inline_style().

props westonruter.
fixes #30032.
Built from https://develop.svn.wordpress.org/trunk@29956


git-svn-id: http://core.svn.wordpress.org/trunk@29703 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Make "Live Preview" the primary action and "Activate" secondary.

props celloexpressions.
fixes #26899.
Built from https://develop.svn.wordpress.org/trunk@29957


git-svn-id: http://core.svn.wordpress.org/trunk@29704 1a063a9b-81f0-0310-95a4-ce76da25c4cd
wp_add_inline_style():
* Change the `wp-inline-style-$handle` class added in [29956] to `$handle-inline-css` for consistency with existing patterns.
* Add the ID attribute when concatenation is enabled as well.

props georgestephanis.
see #30032.
Built from https://develop.svn.wordpress.org/trunk@29958


git-svn-id: http://core.svn.wordpress.org/trunk@29705 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Theme install:
* Move the "based on" string below the rating to avoid wrapping to a second line.
* Reduce the gap between the theme screenshot and description.
* Fix Install button height on mobile.

props obenland, ocean90.
fixes #28148. see #29556.
Built from https://develop.svn.wordpress.org/trunk@29959


git-svn-id: http://core.svn.wordpress.org/trunk@29706 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In wp.updates.decrementCount(), only display the count if it's a valid non-negative integer.

props jdgrimes.
fixes #29527.
Built from https://develop.svn.wordpress.org/trunk@29960


git-svn-id: http://core.svn.wordpress.org/trunk@29707 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use proper functions for escaped translations.

pros jcastaneda.
fixes #30012.
Built from https://develop.svn.wordpress.org/trunk@29961


git-svn-id: http://core.svn.wordpress.org/trunk@29708 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Move password hint text to a function. Add 'password_hint' filter.

props convissor.
fixes #21243.
Built from https://develop.svn.wordpress.org/trunk@29962


git-svn-id: http://core.svn.wordpress.org/trunk@29709 1a063a9b-81f0-0310-95a4-ce76da25c4cd