wordpress 4.8 increases customizer sidebar width and improves accessibility

In announcement by Weston Ruter, Customize maintainer, it has been revealed that Customizer in WordPress 4.8 has variable width..   Ruter said, Ticket #32296 was created to allow the pane to be user-resizable with grabber just like Dev Tools Chrome can be resized...   After lot of back and forth, the scope was reduced to remove the aspect and to instead address more fundamental issue that the sidebar is narrow on high-resolution displays...   WordPress theme and plugin developers who have built custom controls into Customizer are encouraged to test WordPress 4.8 to ensure that they display on large screens...   In WordPress 4.3, Accessibility Team restored H1 headings to the admin screens.   For instance, Add New on Posts and Pages admin screens is included within Posts and Pages text.   Andrea Fercia, WordPress committer and member of the team, explains what theme and plugin authors need to know...   please update your plugin or theme to make the cleaner, ...   WordPress 4.8 ships with new CSS rules to take care of the markup structure and in most cases, no additional changes will be required...   Fercia says the Accessibility team decided to handle the smaller commits versus one large patch.   Read more