x11 : Add support for NET_WM_NAME

[gouchi]

Description

Add support for _NET_WM_NAME, UTF8_STRING

Before using xprop

WM_NAME(STRING) = "RetroArch"
WM_PROTOCOLS(ATOM): protocols  WM_DELETE_WINDOW
_NET_WM_DESKTOP(CARDINAL) = 1
_NET_WM_STATE(ATOM) = _NET_WM_STATE_MAXIMIZED_VERT
WM_STATE(WM_STATE):
		window state: Normal
		icon window: 0x0
WM_CLIENT_MACHINE(STRING) = "pc"
_NET_WM_PID(CARDINAL) = 13942
WM_CLASS(STRING) = "retroarch", "retroarch"
_NET_WM_ICON(CARDINAL) = 	Icon (16 x 16):

After using xprop

_NET_WM_NAME(UTF8_STRING) = "RetroArch"
WM_PROTOCOLS(ATOM): protocols  WM_DELETE_WINDOW
_NET_WM_DESKTOP(CARDINAL) = 1
_NET_WM_STATE(ATOM) = _NET_WM_STATE_MAXIMIZED_VERT
WM_STATE(WM_STATE):
		window state: Normal
		icon window: 0x0
WM_CLIENT_MACHINE(STRING) = "pc"
_NET_WM_PID(CARDINAL) = 13885
WM_CLASS(STRING) = "retroarch", "retroarch"
_NET_WM_ICON(CARDINAL) = 	Icon (16 x 16):

Related Issues

Fix #18444

[zoltanvb]

The C89 failure should be easy to fix, by moving new variable definitions to the top (literally 2 lines).

[gouchi]

Oops, thank you for the feedback !

P.S = I updated PULL_REQUEST_TEMPLATE for a reminder.