Remove duplicated includes
[GLES] speed up blending

(texture * color) costs us an extra operation on Mali when sent as varying.
Instead, since textures use the same color for the entire render, send it as
a uniform instead.

This does not apply to fonts, since the font and its shadow are rendered
together, and may not share a color (tested and looks bad).

This increases fps anywhere heavy blending is done.
[GLSL] cut diffuse+blend render time by 1/3

Mainly seen when we're fading in/out.

Mali likes this ordering better for some reason, ops go from 3 to 2 (according
to their profiler). Verified with PVR's compiler that there is no change, it's
2 there either way.
Fix British English spellings
dialogue      -> dialog    (when referring to GUI window items)
analogue      -> analog
color[s]      -> colour[s]
colorspace    -> colourspace
visualization -> visualisation
normalize     -> normalise
Harddisk      -> Hard disk (consistent with all other usage of "[Hh]ard disk")
disc          -> disk      (context: magnetic media)
disk          -> disc      (context: optical media)

'colourspace' -> 'colour space' nitpick
jsonrpc: fix "file" property not working in AudioLibrary.GetSongDetails (fixes #14508)
video: bring back "Mark as watched/unwatched" into main context menu
[WIN32][cpluff] fixed resource leak.
[cximage] fixed: fixed memory leaks in ximadsp.cpp
[cximage] fixed memory leak in ximatif.cpp
Merge pull request #3265 from wsoltys/cleanup

some fixes in various files
ActiveAE: only apply PCM user layout for stereo if audio switches back from multichannel
Merge pull request #3269 from FernetMenta/aefixes

Audio mode change
Merge pull request #3261 from MilhouseVH/english-fix

Fix British English spellings
[win32] fix remarks about default build
ActiveAEStream: Fix Compiler warning (thx @vdrfan)
 ActiveAE: fix flushing engine on pause after 1a01f4409bed6e2d4d6a0e3149a20ea5fff9c07a
ActiveAE: fix loop for leftover bytes after having fixed compiler warning
[linux] Added "Xbox 360 Wireless Receiver (XBOX)" to <altname> tags for 360 controller keymap
Merge pull request #3257 from Rawk/remove_unneeded_includes

Remove duplicated includes
[GLES] Batch textures and their borders

Gives a considerable speedup in scenes with many bordered images
(like settings).