Update index.html

Translated the alternative image text to pt_BR.
From "A screenshot showing CSS Quick Edit" to the equivalent "Uma screenshot mostrando o editor rápido de CSS"
Adding condition for skipping symlinks when installing extensions via the extension manager

When installing extensions that have symlinks via the extension
manager, they will fail with a message regarding an invalid zip file.
This can be tested with
https://github.com/MiguelCastillo/Brackets-SymbolicLinks
close dropdown on inline editor close or editor resize
Update Tern and Acorn to the latest.

This fixes #6018 and possibly others.
change build.prop to (1) work when on a detached head during jenkins build (2) use bash compatible property key names and (3) include shell git info
use ls-remote to compare HEAD and then reflog as a backup
fix returning reflog promise
* Whole bunch of docs clarifications & type-annotation fixes
* Clarify Save As dialog cancelation handling -- and fix bug where promise
was never resolved in degenerate doSave() case
* Improved some console messages: more explanatory KeyBindingManager error,
more info on Directory exceptions, clarify consequence of LanguageManager
error
* Fix misleading use of "document" in Close Others API & related code naming
* Improve docs for adding new locale translations
allow shell git info to be optional
* Fix bug #6118 (Scrollbar search tickmarks duplicated inside inline editors) --
Be careful to use jQuery selectors that won't find additional matches when
an inline editor is nested inside the target editor.
* Fix bug (injected at ca11256e) where exceptions are thrown on each window
resize.
* Improve accuracy of height/offset calculation used when no scrollbar
is present.
Merge branch 'master' into jasonsanjose/build-prop-keys
Replace uses of doc.url with _server.pathToUrl()
Merge branch 'master' into jasonsanjose/build-prop-keys
Merge pull request #6064 from adobe/dangoor/6018-codehinthang

Update Tern and Acorn to the latest.
Update index.html

Done!
Changed "Uma" to "Um".
Merge pull request #5345 from RafaelOlivra/patch-1

Update index.html
Fix #6142. Check for the argument name to be falsy

In some cases (see #6142 for a minimized testcase), the argument name is
returned as null instead of undefined as the code expects. This fix
simply changes to check for name to be falsy (in which case it will be
assinged a generated name).
Add border-width in CSSCodeHints/CSSProperties.json
Merge pull request #6119 from adobe/pflynn/no-inlineeditor-tickmarks

Fix scrollbar search tickmark bugs
Merge pull request #6143 from busykai/fix-6142

Fix #6142. Check for the argument name to be falsy