Brings the branch up to date with master so #121 can be merged again.
Eight files needed a decision. The branch predates 41111cb ("restore WebUI
styles in SCSS sources"), which recovered into the SCSS a number of rules
that until then existed only in the compiled styles.css, so most conflicts
are that recovery meeting the changes made here. Where both sides describe
the same element the branch's version is kept; where master's rule is a
positioning context the branch has no equivalent for, master's is kept:
* _chat.scss - master's attach-modal, emoji-picker, rightbar context menu
and create-lobby-button rules are kept alongside the compact-message
styles added here. Taking either side whole would have dropped about
450 lines. .chat-own-profile-card, .chat-hub-rightbar and
.chat-hub-rightbar .user keep `position: relative`, because
.chat-create-lobby-btn and .rightbar-context-menu are still declared
`position: absolute` further down and would otherwise escape to the
initial containing block. For .user-tooltip the branch's `position:
fixed` rework wins, and master's `.chat-hub-rightbar .user-tooltip
{ left: -275px }` offset is dropped since it would fight a fixed
element.
* _people.scss - master's restored .friends-list-container context menu
is kept; the pane rules it also restored are shadowed by the branch's
own !important versions and were dropped as dead code.
* boards_util.js - the revived updateContent() and the in-flight dedup in
updateDisplayBoards() are kept. Master's side of the first two hunks
was comment reformatting only.
* board_view.js - the rewrite here is kept whole. Master's only change
since the fork point was `let reader` -> `const reader`, in code the
rewrite replaced.
* chat.js - the modals moved out one nesting level here; that structure
is kept.
* chat_state.js - `require('people/people_util')` is not restored. It is
unused, which is why 35c5c17 removed it.
* build.sh - master's version. The change here concatenated raw .scss
onto the generated CSS; see the following commits.
* styles.css - regenerated, see the following commits.
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