修复滑动窗口出现负数的bug

src/klalb_en_US.properties

@@ -4,9 +4,9 @@ language=Language
 basicsettings=Basic settings
 ipv6addr=IPv6 address
 devicename=Device name
-devicedescription=Device description
+devicedescription=Device description
 dnsserver=DNS server
-extraroutes=Extra routes
+extraroutes=Extra routes
 asnumber=AS number
 tcplistening=TCP listening
 udplistening=UDP listening
@@ -111,14 +111,15 @@ performancesettings=Performance settings
 performancestrategy=Performance strategy
 singlecore=Single-Core - Cache Affinity First (Best energy/performance ratio, for low-power & cloud)
 multifill=Multi-Core - Fill Cores Sequentially (Recommended for general-purpose physical servers)
-multiscatter=Multi-Core - Spread Load Evenly (Optimized for multi-socket NUMA architectures)
-webapisettings=Web API settings
-enablewebapi=Enable Web API
-weblistenaddr=Web API listen address
+multiscatter=Multi-Core - Spread Load Evenly (Optimized for multi-socket NUMA architectures)
+webapisettings=Web API settings
+enablewebapi=Enable Web API
+weblistenaddr=Web API listen address
 invaildweblistenaddr=Invalid Web API listen address
-enabletun=Enable TUN adapter
+enabletun=Enable TUN adapter
 congestionmonitor=Congestion control monitor
 rttbaseline=RTT baseline
 rtt=RTT
 rttmax=RTT max
-rttmin=RTT min
+rttmin=RTT min
+rto=RTO