Added 'NearbyMedia' floater (accessable via new button in Media Remote popup)

-Floater utilizes a slightly modified LLPanelNearbyMedia, which has fading and the 'minimal' mode disabled when its parent is a floater.

  -Due to how LL designed LLPanelNearbyMedia, only one instance should ever be allowed at a time.

Added LLNameBox. To avoid having dupilcate code, logic in LLTextBox::fromXML had to be moved to LLTextBox::initFromXML.

  -Perfomed some additional cleanup. 'name' attribute now parsed in LLUICtrl::initFromXML, or as-needed for elements not based off of LLUICtrl.

LLSlider now respects current DrawContext

Fixed the AO toolbar widget reserving too much width.

Made the "wlfAdvSettingsPopup" setting persist, and un-inverted its logic.

Altered ui initilization order. Toolbar/overlay panels now constructed further into login process.

indra/newview/app_settings/settings.xml

@@ -425,7 +425,19 @@
     </array>
   </map>
 
-  <!-- Begin: AO-->
+    <key>ShowNearbyMediaFloater</key>
+    <map>
+      <key>Comment</key>
+      <string>Show nearby media floter</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Boolean</string>
+      <key>Value</key>
+      <integer>0</integer>
+    </map>
+    
+    <!-- Begin: AO-->
 
   <key>ShowAOSitPopup</key>
   <map>
@@ -1125,7 +1137,7 @@ This should be as low as possible, but too low may break functionality</string>
       <key>Comment</key>
       <string>Show Windlight popup</string>
       <key>Persist</key>
-      <integer>0</integer>
+      <integer>1</integer>
       <key>Type</key>
       <string>Boolean</string>
       <key>Value</key>
@@ -16940,6 +16952,22 @@ This should be as low as possible, but too low may break functionality</string>
         <integer>473</integer>
       </array>
     </map>
+    <key>FloaterNearbyMediaRect</key>
+    <map>
+      <key>Comment</key>
+      <string>Rectangle for nearby media floater.</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Rect</string>
+      <key>Value</key>
+      <array>
+        <integer>0</integer>
+        <integer>0</integer>
+        <integer>0</integer>
+        <integer>0</integer>
+      </array>
+    </map>    
     <key>WindEnabled</key>
     <map>
       <key>Comment</key>