chore: telnet supports backspace key setting

src/main/resources/i18n/messages.properties

@@ -197,6 +197,7 @@ termora.new-host.proxy=Proxy
 
 termora.new-host.terminal=${termora.settings.terminal}
 termora.new-host.terminal.encoding=Encoding
+termora.new-host.terminal.backspace=Backspace
 termora.new-host.terminal.heartbeat-interval=Heartbeat Interval
 termora.new-host.terminal.startup-commands=Startup Command
 termora.new-host.terminal.env=Environment

src/main/resources/i18n/messages_zh_CN.properties

@@ -188,6 +188,7 @@ termora.new-host.proxy=代理
 
 termora.new-host.terminal=${termora.settings.terminal}
 termora.new-host.terminal.encoding=编码
+termora.new-host.terminal.backspace=退格键
 termora.new-host.terminal.heartbeat-interval=心跳间隔
 termora.new-host.terminal.startup-commands=启动命令
 termora.new-host.terminal.env=环境

src/main/resources/i18n/messages_zh_TW.properties

@@ -187,6 +187,7 @@ termora.new-host.proxy=代理
 
 termora.new-host.terminal=${termora.settings.terminal}
 termora.new-host.terminal.encoding=編碼
+termora.new-host.terminal.backspace=退格鍵
 termora.new-host.terminal.startup-commands=啟動命令
 termora.new-host.terminal.heartbeat-interval=心跳間隔
 termora.new-host.terminal.env=環境