* Change links to buttons, expose `aria-pressed` for toggles
- also make existing `<a routerLink...>` type controls keyboard focusable with the addition of `tabindex="0"`
* Correctly set aria-pressed
now that I have a working build environment, could verify correct way to set this with my limited Angular knowledge
* Change more links to buttons, initial style changes
* Fix layout of <button> elements with .box-content-row
* Update jslib submodule
* Add `aria-expanded` to the send view's "Show options" expand/collapse control
* Fix position of "Edit" pencil when hovering over folders
* Update jslib
* Change sends list links to buttons
* Add `aria-pressed` to vault and send list buttons
Programmatically denote which of the buttons is currently active/shown in the right-most panel
* Fix incorrect "Options" expand/collapse button in add-edit view
Currently, that buttons lacks an accName because the "Options" text is outside of it.
* Add `aria-pressed` to the send left-hand column filters
* Simplify base, list, and vault styles
Since links are now buttons, no need to double up selectors for both types of elements. No need to double-up theming in base, as this also causes incorrect "x" in toasts.
* Remove unnecessary `position:relative`
Fixes issue with cut-off focus outlines, has no other adverse effect
* Fix styling for last child of action buttons
Old approach of making right padding smaller results in unsightly, off-center icon (noticeable when focus outline is visible). This visually remains the same, but reduces right-hand margin instead.
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