Dashboard page: "major" accessibility issues that may not need design

[ndushay]

From https://docs.google.com/spreadsheets/d/1Fs5sY1zgpovWVdHMqpJWRu2Zvyr53jw7, here are "major" accessibility issues for the Dashboard page that we can fix without design changes. (Note: Mike addressed accessibility level A and AA problems noted by the SiteImprove, WAVE and Axe browser plugins in PR #3159)

Note that solutions may be suggested in https://docs.google.com/spreadsheets/d/1Fs5sY1zgpovWVdHMqpJWRu2Zvyr53jw7.

These can be separate PRs, and/or split into separate tickets.

• The "Cite" button is repeated multiple times: form field labels should be unique. See Cite buttons do not have unique IDs #3188
• When "Request access to another collection" is selected and the tooltips are visible, the controls that open the tooltips are not associated with the tooltip content. See Some accessibility fixes for welcome/home page #3179
• There are link elements that do not have meaningful text. Within the table, there is link text that is not unique, such as the "Copy persistent link" links. See Dashboard: "Copy persistent link" elements need unique, meaningful text #3190
• The error messages appear briefly, but they do not remain visible. Also in Welcome page: "major" accessibility issues that may not need design #3171
• There is no visual indication of keyboard focus when using TAB or SHIFT+TAB to navigate through controls of the website. This includes the "Deposits in progress -- please complete" and "Your collections" buttons and the Cancel button in the Help modal dialog. NOTE: may be fixed by PR Some accessibility fixes for welcome/home page #3179
• When the page is resized and hamburger menu is open, focus moves into the links area but focus is not visible.
• Some elements are not well formed. There are multiple <h5> instances with an id="content-type-prompt" present (id must be unique??) See Improve accessibility for welcome/home page and dashboard #3159.
• (Minor level) There are list items that are not direct descendants of list containers (<ol> or <ul>). For the list of collections, there is an element between the <ul> and the <li>.
• (Minor level) There are headings that have structural markup that does not accurately communicate the heading level. The modal dialogs each have <h5> headings instead of <h2>. #See 3332

[aaron-collier]

Each of the above points has been resolved, is in progress in a PR, or ticketed separately, closing.