Codechange: automatic adding of _t to (u)int types, and WChar to char32_t

for i in `find src -type f|grep -v 3rdparty/fmt|grep -v 3rdparty/catch2|grep -v 3rdparty/opengl|grep -v stdafx.h`; do sed 's/uint16& /uint16 \&/g;s/int8\([ >*),;[]\)/int8_t\1/g;s/int16\([ >*),;[]\)/int16_t\1/g;s/int32\([ >*),;[]\)/int32_t\1/g;s/int64\([ >*),;[]\)/int64_t\1/g;s/ uint32(/ uint32_t(/g;s/_uint8_t/_uint8/;s/Uint8_t/Uint8/;s/ft_int64_t/ft_int64/g;s/uint64$/uint64_t/;s/WChar/char32_t/g;s/char32_t char32_t/char32_t WChar/' -i $i; done

Fix: Ensure 31-bit shifts are unsigned. (#10128)

Shifting a signed 32-bit integer by 31 bits is undefined behaviour.
A few more than necessary are switched to unsigned for consistentency.

Feature: rework in-game Online Players GUI

The GUI now more clearly shows some basic information about the
server you joined, your client name (and the ability to change it),
and what players are in which company.

It also contains useful buttons to press to join companies, chat
with other people, and for admins to kick/ban people.

Additionally, renamed "advertised" to "visibility"; this has to
do with future additions, but also because it is more clear in
wording.

Feature: Group liveries, and livery window usability enhancements. (#7108)

* Change: Replace checkbox in livery selection window with Default option in drop down selection.

This reduces clutter in the UI and allows for primary/secondary colours to independently follow the default scheme if desired.

* Feature: Add vehicle group liveries.

(svn r12288) -Fix(r12287): forgot to include two sprite renames out of consistency.
And obviously forgot to compile before committing, as the array rename would have been evident.

(svn r11748) -Codechange: Remove magic numbers introduced on r11746 and r11727
-Codechange: A few bad coding style inadvertendly applied too

(svn r11457) -Fix: (r11455) Reenable the accidentaly removed one way roads option
-Change: Enable one way roads like the remove via a toolbar icon

(svn r11446) -Codechange: change the naming of road related code parts to something more descriptive
-Change: invert the two single roads gui buttons, making it consistent with rails toolbar
Based on a patch by Octopussy

(svn r11433) -Fix: starting OpenTTD with DOS files made it look weird out of the box.
-Change: make extra sprites (the ones not in the TTD GRFs) replaceable using Action 5.
-Feature: make replacing contiguous subsets of sprites in for some types possible in Action 5.
Note to GRF authors: when you replaced OpenTTD sprites that are not from the TTD GRF files using Action A, your GRF will not have the intended result anymore as the sprite numbers have changed. You should replace the Action A with an Action 5 from now on.

(svn r10659) -Codechange: updated documentation around RAIL_GROUND_FENCE_VERT[12] (frosch)
-Codechange: added documentation and SPR_ enums for track fences (frosch)