[Freeciv-Dev] (PR#11447) Should highlight chat text entry area if focus is placed there

["craig@xxxxxxxxxxxxxx" <craig@xxxxxxxxxxxxxx>]

<URL: http://bugs.freeciv.org/Ticket/Display.html?id=11447 >

highlight chat text entry area if focus is placed there

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FreeCiv "powerusers" use the keyboard shortcuts for most 
commands instead of going to the menu. However, if they have
been chatting, none of their key presses will be interpreted
as a command, since the focus is in the chat textfield. Sometimes
even the smartest of us will halt their train of thought to 
debug what's happening, suspecting that they suddently ran into 
an obscure FreeCiv bug! Yet, it's not a real bug. 

One easy way to prevent this workflow mistake is to highlight 
the background of the chat textfield when it has focus. This 
brings the textfield to the user's attention and they will 
more likely remember to click on the map before pressing keys. 

A medium dark shade of yellow is the best. ;)