Minor search path updates, initial UI clean up, and more wxDC zoom work.

* Add default OS program install path(s) to search path list as fail safe.
* Remove unnecessary wxGetApp calls in WinEDA_App class methods.
* Remove non-standard message panel font and changed background to system menu color.
* Remove italic fonts from menus.
* Remove non-standard font in Kicad app project tree.
* Remove font selection dialog menu items from apps for removed fonts.
* Remove all global variables and settings associated with the removed fonts.
* Fixed PCBNew export and import library file dialog response tests from wxCANCEL to wxID_CANCEL.

common/basicframe.cpp

@@ -39,7 +39,6 @@ WinEDA_BasicFrame::WinEDA_BasicFrame( wxWindow* father,
     wxSize minsize;
 
     m_Ident  = idtype;
-    SetFont( *g_StdFont );
     m_HToolBar       = NULL;
     m_FrameIsActive  = TRUE;
     m_MsgFrameHeight = MSG_PANEL_DEFAULT_HEIGHT;
@@ -302,19 +301,6 @@ void WinEDA_BasicFrame::ProcessFontPreferences( int id )
     case ID_PREFERENCES_FONT:
         break;
 
-    case ID_PREFERENCES_FONT_STATUS:
-        font = wxGetFontFromUser( this, *g_StdFont );
-        if( font.Ok() )
-        {
-            int pointsize = font.GetPointSize();
-            *g_StdFont = font;
-            SetFont( *g_StdFont );
-            if( GetStatusBar() )
-                GetStatusBar()->SetFont( *g_StdFont );
-            g_StdFontPointSize = pointsize;
-        }
-        break;
-
     case ID_PREFERENCES_FONT_DIALOG:
         font = wxGetFontFromUser( this, *g_DialogFont );
         if( font.Ok() )