Prevent page content shifting on pub.dartlang.org package pages

[DartBot]

Originally opened as dart-lang/sdk#7958

This issue was originally filed by kelloggk...@gmail.com

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In some browsers, switching tabs on package pages can cause the page content to shift when showing/hiding the vertical scrollbar.

Example: http://pub.dartlang.org/packages/puremvc

CSS fix (always show scrollbar):

body {
  overflow-y: scroll;
}

[DartBot]

<img src="https://avatars.githubusercontent.com/u/188?v=3" align="left" width="48" height="48"hspace="10"> Comment by nex3

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Added Area-Pub, Triaged labels.

[DartBot]

This comment was originally written by googlegroups...@kaioa.com

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The same issue exists on dartlang.org and api.dartlang.org.

It's always a good idea to use overflow-y:scroll if the page is inside a horizontally centered container.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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Added this to the Later milestone.
Removed Type-Defect, Priority-Medium labels.
Added Type-Enhancement, Priority-Low labels.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/264967?v=3" align="left" width="48" height="48"hspace="10"> Comment by amouravski

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Removed Area-Pub label.
Added Area-Site, Community-StarterBug labels.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5479?v=3" align="left" width="48" height="48"hspace="10"> Comment by sethladd

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Removed Area-Site label.
Added Area-Pub, Pub-Site labels.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/188?v=3" align="left" width="48" height="48"hspace="10"> Comment by nex3

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Removed Area-Pub, Pub-Site labels.
Added Area-PubSite label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/2156198?v=3" align="left" width="48" height="48"hspace="10"> Comment by kasperl

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Removed this from the Later milestone.
Added Oldschool-Milestone-Later label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/2156198?v=3" align="left" width="48" height="48"hspace="10"> Comment by kasperl

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Removed Oldschool-Milestone-Later label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/3766663?v=3" align="left" width="48" height="48"hspace="10"> Comment by nicolasgarnier

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This issue has been moved to Github as part of a migration. Please use the Issue on Github going forward: https://github.com/dart-lang/pub-dartlang/issues

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Added MovedToGithub label.