Improvements and fixes

• Added the ability to search for tags in the CRM.
• Added a rule that prevents adding multiple tags with the same name.
• Added the ability to reorder custom fields on the client details page.
• Added support for existing shortcuts to several new places — Command + A (Select All) on custom fields, Escape (Close) for drop downs, etc.
• Fixed a number of minor UI bugs that happened when quickly creating or interacting with custom fields.