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"
Update Tern and Acorn to the latest.

This fixes #6018 and possibly others.
Grammatical improvements(Swedish)

Minor improvements to the Swedish language
Avoid wrapping in inline editors when they get too narrow
Move the nowrap attribute to the inline text editor container so it doesn't affect other kinds of inline editors
Merge pull request #6112 from Abbe98/master

Grammatical improvements(Swedish)
Merge pull request #6120 from adobe/nj/issue-5865

Avoid wrapping in inline editors when they get too narrow
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
Merge branch 'master' of https://github.com/adobe/brackets