Accessibility fixes for general Confluence soy/velocity templates

Problem Definition

Currently there are a few accessibility issues with the templates for this plugin, it is missing some accessibility code:

• admin/viewclasspath.vm
  add alt for check and error images
• includes/soy/icons.soy
  Remove "a" tag surrounding .contentIconFont in else statement
• includes/soy/user.soy
  Remove "a" tag surrounding .userLogo images Updated alt for img tags to blank
• includes/fancybox/jquery.fancybox-1.3.4.js (and jquery.fancybox-1.3.4-min.js)
  add aria-label for fancybox-close, fancybox-left, and fancybox-right
• includes/js/attachments.js (and attachments-min.js)
  Added aria-expanded attribute to click function
• includes/js/header-user-menu.js (and header-user-menu-min.js)
  add blank alt attribute
• includes/js/tree.js (and tree-min.js)
  add aria-labels and aria-expanded to expand div add tabindex to expand div
• includes/common-choosetheme.vm
  Replaced Label with span for currentTheme applied Strong tag to currentThemeName
  Add for attributes to labels for theme choice radio's
• includes/network-macro.vm
  Added for tags for each assistive label
• includes/users/editmysettings.vm
  Added id for each aui fieldset item
• includes/users/viewuser.vm
  Add aria-label to a links
• login.vm
  add html lang attribute
  add lang attribute to each language selector
• checklist.vm
  add alt text to check and error images
• decorators/includes/page-metadata.vm
  remove metadata skip link
• decorators/includes/page-metadata-with-icons.vm
  remove metadata skip link
• pages/includes/attachment_icon.vm
  remove title attributes (these are not required if text in the tag are identical)
• pages/includes/attachments-table.vm
  add table headers assistive text
  add aria-expanded attribute and role="button" to expand history
  to do find a place to add javascript to auto update the expand attribute
• pages/templates/common-listpermissionpages.vm
  add aria-label to remove restrictions "a" tag and alt attribute to ulock image
• pages/viewinfo.vm
  add aria-label to a tag
  add alt to image tag
  add assistive th text to Recent Changes (needs to be added to language.properties) add blank alt text to external link arrow image
• pages/viewpreviousversions.vm
  add blank alt text to profile pic image
  add assistive th text to page history container
  add label for each compare version checkbox with assistive text
• template/includes/menu-macros.vm
  add aria-label to "a" tag menuMacros_renderImageLink
  add aria-label to "a" tag menuMacros_renderTailedDropdownMenu
• template/includes/macros.vm
  add table headers to showPermissionsHeaders
  add alt for check and error images in permissionValueCell
• follow/follow-user-result.vm
  add alt for check and error images
• spaces/viewspacedetails.vm
  Move Edit link into an "a" tag and convert existing "a" tags to span's convert all labels to spans (associated css classes are in the auiplugin)