Changes:
* Changed the button class from LLButton to LLMenuButton to avoid duplicating menu positioning logic.
* Enabled LLMenuButton to support aligning menu to the top right corner of the button.
- LLMenuGL in menu button replaced by LLToggleableMenu that handles visibility change upon clicks inside specific button rect.
- Added visibility change signal to LLToggleableMenu to update menu button pressed state.
- Added using menu handle in LLMenuButton.
- Changed type of gear menu buttons from LLButton to LLMenuButton in all sidebar panels where gear menu button is used.
- Added setMenuPosition(), setMenu() and updateMenuOrigin() to the LLMenuButton.
- Moved actions common for displaying a context menu to LLMenuButton::toggleMenu().
- In all sidebar panels where LLButton was replaced with LLMenuButton the following steps were taken:
1. setting gearMenu and its position relative to the menuButton with LLMenuButton::setMenu()
2. setting mouse down callback for the menuButton if needed.
3. calculating the menu origin point with LLMenuButton::updateMenuOrigin() in mouse down callback
Resolved conflicts in lltexteditor.cpp, llchatitemscontainerctrl.cpp, llchatmsgbox.cpp, llfloaterbuycurrency.cpp, llnearbychat.cpp, floater_buy_currency.xml, and ru/strings.xml
Merging revisions 134925-135157 of svn+ssh://svn.lindenlab.com/svn/linden/branches/gooey/gooey-4 into C:\source\viewer-2.0.0-3, respecting ancestry
Oz Linden