Fixes/Cleanup for the MemcardManager.

Notable Changes:
Fixes right click menu in linux.
Fixes Issue 2412.
sram.raw file is no longer required to format a memcard
Update to use new ini sections, automatically remove default settings from ini file
enable pages setting no longer requires memcard manager to be reopened to take effect
it is no longer possible to switch to a negative page number

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6546 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/DolphinWX/Src/MemoryCards/GCMemcard.cpp

@@ -1156,14 +1156,15 @@ bool GCMemcard::Format(bool sjis, bool New, int slot, u16 SizeMb, bool hdrOnly)
 	if ((SizeMb != MemCard2043Mb) || (data_size != mc_data_size)) return false;
 
 	pStream = fopen(File::GetUserPath(F_GCSRAM_IDX), "rb");
-	if (pStream == NULL)
+	if (pStream)
 	{
-		PanicAlert("Could not open SRAM file");
-		return false;
+		fread(&m_SRAM, 1, 64, pStream);
+		fclose(pStream);
+	}
+	else
+	{
+		m_SRAM = sram_dump;
 	}
-	fread(&m_SRAM, 1, 64, pStream);
-	fclose(pStream);
-
 	time = CEXIIPL::GetGCTime();
 	rand = Common::swap64(time);