Use the same growth strategy in wxArrayString as in wxVector

Remove maximal reallocation size in wxArrayString too, as it was done
for wxVector a commit ago, and increase its size by 100% and not 50%
when it needs to grow.

There is no real reason to use different growth strategies in the two
classes and wxVector one seems to be better.

src/common/arrstr.cpp

@@ -57,9 +57,6 @@ wxArrayString::wxArrayString(size_t sz, const wxString* a)
 
 #if !wxUSE_STD_CONTAINERS
 
-// size increment = min(50% of current size, ARRAY_MAXSIZE_INCREMENT)
-#define   ARRAY_MAXSIZE_INCREMENT       4096
-
 #ifndef   ARRAY_DEFAULT_INITIAL_SIZE    // also defined in dynarray.h
 #define   ARRAY_DEFAULT_INITIAL_SIZE    (16)
 #endif
@@ -139,11 +136,8 @@ wxString *wxArrayString::Grow(size_t nIncrement)
     else {
       // otherwise when it's called for the first time, nIncrement would be 0
       // and the array would never be expanded
-      // add 50% but not too much
       size_t ndefIncrement = m_nSize < ARRAY_DEFAULT_INITIAL_SIZE
-                          ? ARRAY_DEFAULT_INITIAL_SIZE : m_nSize >> 1;
-      if ( ndefIncrement > ARRAY_MAXSIZE_INCREMENT )
-        ndefIncrement = ARRAY_MAXSIZE_INCREMENT;
+                          ? ARRAY_DEFAULT_INITIAL_SIZE : m_nSize;
       if ( nIncrement < ndefIncrement )
         nIncrement = ndefIncrement;
       m_nSize += nIncrement;