Show glow around interactive objects on hover.  Glow shows through objects/avatars - this is expected.
Effect from DaveP long ago, hover code by me long ago, just changing the default setting.

(ad70c07b05b6 was 'Reduced "Medium" font size, which is a temporary fix until menu font can be defined specifically. http://jira.secondlife.com/browse/EXT-1315')

This change was too all-around impactful just for the sake of the menu font - it made medium and small font sizes indistinguishable, leading to lots of invisible mismatches as long as this hack persisted...

As suspected a morph mask issue. Apparently we were setting success to false
if the user specifies a pant or shrit texture without an alpha channel.
Result: bad morph masks.

Patch begins to clean up the isMorphMaskValid issue, as well as fixing this
error.

Code reviewed by Vir

Oh well, this should still be better.

I've added a hyperlink to the "You just entered a region using a
different server version" notification. Users can click over this link
to view the release notes for that server version.

This notification recently started turning up in the local chat log,
so the above solution works in that case as well as if it remained as
a popup notification panel.

This is the same fix as DEV-32269, trivially ported to viewer2.
reviewed by merov, james, moss!

--HG--
branch : texture-pipeline

Apparently, pre-login notifications use LLAlertDialog, but post-login
notifications use LLToastAlertPanel. The latter is basically a copy
and paste of the former, with some local modifications. However, the
person who copy/pasted the code did not initialize the URLLoader
callback, so all notifications that tried to open a web page on a
button click after login were failing.

I've added comments that this code should be refactored, preferably as
a subclass of LLAlertDialog. In the meantime, I've tried to clean it
up a bit by not duplicating the nested URLLoader class (which would've
required further duplication to reimplement the exact same loader class
that LLAlertDialog uses). This let me then initialize the URLLoader
callback for LLToastAlertPanel, to fix this specific bug.

Again... arghhh!!

min->llmin, max->llmax

Reviewed by Mani

New attribute header_image_expanded supplies background image.
Reviewed with Leyla (last commit too)

EXT-2241 layout of Preferences > Sound needs to be improved for I18N, EXT-2276 Advanced water settings floater sliders spaced too tight

When the amount of the texture that's being drawn by the plugin shrinks in either width or height, reallocate the texture (which clears it).

Font and color can be set in accordion_tab.xml

Media focus is still tracked separately from LLSelectMgr (which was a change made during a refactor a while ago), but LLViewerMediaFocus now keeps LLSelectMgr updated with the current media focus when it changes.

Added a special case for media focus to LLSelectMgr::deselectAllIfTooFar(), since it was making the focus ring not show up when media focus was on distant media.

Otherwise it discards a typed line in progress.

Normally LL_ERRS in a developer build of the viewer pops up an OS message box
with the text of the LL_ERRS log message, requiring user intervention to
proceed. This isn't good for unattended testing, especially on Parabuild
machines. Running the viewer with '--set QAModeTermCode n' for some
0 < n < 256 will, on LL_ERRS, cause the viewer to terminate immediately with
_exit(n).