EXP-1846 FIX Text positioning issues in Floaters, Notifications, UI, and...

EXP-1846 FIX Text positioning issues in Floaters, Notifications, UI, and toasts with UI size smaller than 1
also, re-enabled floater_test_textbox.xml

indra/llrender/llfontgl.cpp

@@ -215,16 +215,17 @@ S32 LLFontGL::render(const LLWString &wstr, S32 begin_offset, F32 x, F32 y, cons
 	cur_y = ((F32)y * sScaleY) + origin.mV[VY];
 
 	// Offset y by vertical alignment.
+	// use unscaled font metrics here
 	switch (valign)
 	{
 	case TOP:
-		cur_y -= getAscenderHeight();
+		cur_y -= mFontFreetype->getAscenderHeight();
 		break;
 	case BOTTOM:
-		cur_y += getDescenderHeight();
+		cur_y += mFontFreetype->getDescenderHeight();
 		break;
 	case VCENTER:
-		cur_y -= (getAscenderHeight() - getDescenderHeight()) / 2.f;
+		cur_y -= (mFontFreetype->getAscenderHeight() - mFontFreetype->getDescenderHeight()) / 2.f;
 		break;
 	case BASELINE:
 		// Baseline, do nothing.

indra/newview/skins/default/xui/en/floater_test_textbox.xml

@@ -8,18 +8,7 @@
  help_topic="floater_test_textbox"
  translate="false"
  width="800">
-    <text
-     type="string"
-     length="1"
-     height="90"
-     layout="topleft"
-     left="10"
-     valign="bottom"
-     clip="true"
-     top_pad="30"
-     width="300">
-___</text>
-  <!--<text
+ <text
     clip_partial="true"
     top_pad="10"
     left="10"
@@ -150,7 +139,7 @@ ___</text>
     The 华文细黑 brown fox ヒラキjumped over the lazy dog.
   </text>
   
---><!-- next column --><!--
+<!-- next column -->
   <text_editor
  height="50"
  follows="top|left|bottom"
@@ -247,5 +236,5 @@ with
 multiple lines
 and too many lines
 to actually fit
-  </text>-->
+  </text>
 </floater>