Tab font fix and cmd line improvements

[demonnic]

Adds

• demonnic.chat:setActiveTabCSS(stylesheet)
• demonnic.chat:setInactiveTabCSS(stylesheet)
• demonnic.chat:setCmdLineStyleSheet(stylesheet)
• demonnic.chat:enableCmdLine(tabName, template)
• demonnic.chat:disableCmdLine(tabName)
• demonnic.chat:enableAllCmdLines()
• demonnic.chat:disableAllCmdLines()

Fixes:

• can now log in plaintext, previously would log in ansi if plaintext was set
• supports more timeformat characters.