logic: apply some shared memory fixes

* corrections in estimating size of intermediate indexer commands
* avoided clearing and refilling the indexed files list every time files get added
* changed memory growth policy of InterprocessIndexingStatusManager to double allocated memory when it gets full
* added potential to grow memory when adding crashed file paths

src/lib_cxx/data/indexer/IndexerCommandCxx.cpp

@@ -26,17 +26,17 @@ size_t IndexerCommandCxx::getByteSize() const
 
 	for (auto i : m_systemHeaderSearchPaths)
 	{
-		size += i.str().size();
+		size += sizeof(std::string) + i.str().size();
 	}
 
 	for (auto i : m_frameworkSearchPaths)
 	{
-		size += i.str().size();
+		size += sizeof(std::string) + i.str().size();
 	}
 
 	for (auto i : m_compilerFlags)
 	{
-		size += i.size();
+		size += sizeof(std::string) + i.size();
 	}
 
 	return size;