Codechange: Add Rect version of FillDrawPixelInfo().

This simplifies most callers as they longer have to split out a rect.

Codechange: Remove FONT_HEIGHT_... macros. (#11481)

These make it look like we're dealing with a constant, but actually each is a call to `GetCharacterHeight(...)`.

Codechange: cleanup CargoPacket in terms of variable/function names (#11278)

Over the years, things got reused and changed, making the current
names somewhat unclear in what they actually mean and do.

Codechange: Base CargoArray off std::array.

This avoids needing to define array accessors and allows use of
default value initialization.

Fix #10114: Wonky depot layout. (#10191)

Depot lists internal layout was not handled well. This is improved by
throwing more Rects at it:
- Vehicle images are now be vertically centred in the rect.
- Image clipping is relaxed to cover the rect, improving larger sprites.
- Outline highlight is now aware of bevel thickness.

Change: Use power-of-2 scaling for some dimensions in GUI.

These are related to drawing sprites that are normally drawn on the
landscape, and should therefore still follow power-of-2 scaling to fit
correctly.

(svn r21924) -Codechange: Unify some parts of the articulated vehicle code.
-Cleanup: Avoid conversions to Train and RoadVehicle that are no longer required.

(svn r13715) -Fix [FS#2129]: C-like strings had to be rebound each time they were printed, otherwise the text could change due to the few number of slots that could be used to bind.
-Codechange: remove all BindCString and related functions and replace it by RAW_STRING which prints the C-string raw pointer that is on the 'print stack'.

(svn r11374) -Codechange: Give meaning to the magical number that specifies the color of the text in a DrawString call.
Patch heavily based on BiBB's work (FS#1383)

(svn r10258) -Codechange: as we are now using int64 all over the place, it's better to use int64 variables in the string generating too instead of packing them into two int32s.
-Fix: some displays of money were wrong.

(svn r10097) -Feature: Add support for articulated road vehicles, or callbacks 11 and 17 for
road vehicles for those who prefer the technical explanation.