v4.5.15.19 release

v4.5.15.19 had six bug fixes.

Significant defects addressed

• Corrected an issue preventing proper update of default placeholder text. For example, a Byline field's default placeholder text is an asset's author. Deleting the author from the asset did not remove the author from the Byline field.
• Corrected an issue causing delays in rendering large tables in the rich-text editor.
• Corrected an issue causing multiple selections to be cleared. For example, an editor selects two options in a selection field, and then types in the field to locate additional options. After typing in the field, the previous two selections are lost.
• Corrected an issue causing the rich-text editor to mark correctly spelled words as incorrect, and incorrectly spelled words as correct.
• Corrected an issue returning a Service Unavailable status when multiple editors are searching for assets through the search panel.
• Corrected an issue throwing a NullPointerException when selecting several assets in search results and then clicking more_horiz to open the search actions menu.