Add bidirectional text support by default

Make Konsole BiDi rendering enabled by default. Default Shell.profile
and also fallback profile are updated to have BidiRenderingEnabled set
to true by default.
AFAIK there is no reason not to have it on by default.  I don't see
any penalty code-wise.
BUG: 198169
FIXED-IN: 4.8

data/profiles/Shell.profile

@@ -181,5 +181,6 @@ ColorScheme=Linux
 ScrollMode=FixedLineCount
 ScrollLineCount=1000
 
-
+[Terminal Features]
+BidiRenderingEnabled=true
 

src/Profile.cpp

@@ -183,7 +183,7 @@ FallbackProfile::FallbackProfile()
     setProperty(TripleClickMode,SelectWholeLine);
 
     setProperty(BlinkingCursorEnabled,false);
-    setProperty(BidiRenderingEnabled,false);
+    setProperty(BidiRenderingEnabled,true);
     setProperty(CursorShape,BlockCursor);
     setProperty(UseCustomCursorColor,false);
     setProperty(CustomCursorColor,Qt::black);