(svn r2170) -fix: [1179457] the industry list can now no longer scroll down then the end of the list is reached (Hackykid)

(svn r2169) -Fix: Doing the slot clearing also for crashed road vehicles (c.f. previous commit)

(svn r2168) - Fix: Various stages of invisible trains, and wrong v->u.rail.track combinations. When a vehicle was sold its (possibly) assigned road slot for multislot was not cleared, thus resulting in a bug confusion. This should fix [ 1178520 ] Assertion failure in ai.c (invalid v->u.rail.track). With big thanks to TrueLight for the demo-recording patch, BJH for the wonderful savegame, Hackykid for his brilliant suggestions of the problem and Celestar for... ehm, making it all possible ;p

(svn r2167) -fix: [autoreplace] trains now get the default cargo type if the engine
replaced from did not have cargo capacity (instead of refitting to passengers)

(svn r2166) Fixed two warnings in the last commit.

(svn r2165) - Codechange: [NPF] Properly enummed NPF hash size, it is easily changable now.
- Codechange: [NPF] Improved the NPF hash calculation slightly.
- Codechange: [NPF] Increased hash size, should speed up somewhat.

(svn r2164) - Language: [ 1173684 ] fix some wrong french translations (glx)

(svn r2163) - SVN: Set ignore on grfcodec for when you decode/encode grf files there

(svn r2162) - Fix: Tooltips of horizontal scrollbars were wrong; they now say left/right instead of up/down

(svn r2161) - Fix: When resizing a window, the button is also visibly depressed
- CodeChange: Use images as arrows in the scenario-date scroller, looks better
- Feature: Clicked buttons with images/text now visibly depress their contents when pressed (eg it really seems like the button is moving)
- Fix: Fix sprite offsets of the arrow sprites in openttd.grf