Buxfix - crased on delete last symbol in Filename format

src/utils/filenamehandler.cpp

@@ -32,9 +32,13 @@ QString FileNameHandler::parsedPattern() {
 
 QString FileNameHandler::parseFilename(const QString &name) {
     QString res = name;
+    // remove trailing characters '%' in the pattern
     if (name.isEmpty()) {
         res = QLatin1String("%F_%H-%M");
     }
+    while(res.endsWith('%')) {
+        res.chop(1);
+    }
     std::time_t t = std::time(NULL);
 
     char *tempData = QStringTocharArr(res);