libcommon|Automap: Use at least 14 units of offset for map number

Conforms with earlier behavior in case the patch information is not
applicable.
Client|Console: Improved log widget behavior

When opening the log for the first time, don't waste time scrolling
through all the messages since launch. Instead, open as normally with
a clear log.

The problem was that the log wrapper wasn't told the width of the
widget until it was drawn (visible) for the first time.
Windows|qmake: Disable global optimizations (Og) in release build

/Og has been causing us grief (e.g., automap not visible).
Fixed|libcommon: Updating the ready item of the inventory

It appears P_GetInvItem() was being called with an invalid parameter.
libcommon: Place message log below map title

If the map title is visible, either due to the start of a map or
because the automap is open, the HUD message log is moved downwards
a little so it doesn't overlap.

Thanks to Vermil for reporting the issue.

Also fixes the issue where the message log would not be drawn at all
when the title is shown in the beginning of a map.