Fixed: keyword expanding could hang if there is a keyword that matches "";

Fixed: drop down list now stays open after mouse out the second time it is used;
Fixed some typos in comments;
Disabled 'check updates' menu item for 0.3.5 release

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@711 0fc631ac-6414-0410-93d0-97cfa31319b6

src/data/keyword.cpp

@@ -479,6 +479,7 @@ String KeywordDatabase::expand(const String& text,
 							kw->match_re.GetMatch(&start_u, &len_u, 0);
 							size_t start = untagged_to_index(s, start_u, true),
 							       end   = untagged_to_index(s, start_u + len_u, true);
+							if (start == end) continue; // don't match empty keywords
 							result += s.substr(0, start);
 							
 							// Split the keyword, set parameters in context