MAINT-5207 Build: Snap to grid / Grid options broken, object snaps to incorrect Units

FIXED
- Decrase the minimal dev. pix. width to 3. That should be enought.
- Remove the mouse down offset from the snapping algorithm. IMHO it shouldn't be here. Snapping should be right on the mosue pointer.

indra/newview/llmanip.h

@@ -1,4 +1,4 @@
-/** 
+/** 
  * @file llmanip.h
  * @brief LLManip class definition
  *
@@ -37,7 +37,7 @@ class LLToolComposite;
 class LLVector3;
 class LLObjectSelection;
 
-const S32 MIN_DIVISION_PIXEL_WIDTH = 9;
+const S32 MIN_DIVISION_PIXEL_WIDTH = 3;
 
 class LLManip : public LLTool
 {

indra/newview/llmaniptranslate.cpp

@@ -1,4 +1,4 @@
-/** 
+/** 
  * @file llmaniptranslate.cpp
  * @brief LLManipTranslate class implementation
  *
@@ -548,12 +548,7 @@ BOOL LLManipTranslate::handleHover(S32 x, S32 y, MASK mask)
 		if (off_axis_magnitude > mSnapOffsetMeters)
 		{
 			mInSnapRegime = TRUE;
-			LLVector3 mouse_down_offset(mDragCursorStartGlobal - mDragSelectionStartGlobal);
 			LLVector3 cursor_snap_agent = gAgent.getPosAgentFromGlobal(cursor_point_snap_line);
-			if (!gSavedSettings.getBOOL("SnapToMouseCursor"))
-			{
-				cursor_snap_agent -= mouse_down_offset;
-			}
 
 			F32 cursor_grid_dist = (cursor_snap_agent - mGridOrigin) * axis_f;