wmaker: Restore multi screen functionality by reverting wrong commits

Revert patches that moved variables from WMScreen to global level
because this broke X displays with multiple independent screens and
caused dock and clip icons to become mixed up. When managing multiple
screens each screen used to have it's own state/dock and clip. This
commit restores that by reverting mainly the commits listed below (and
those that are invalidated by reverting these) and fixing up later
commits to apply after the revert.

Reverted commits:
f60e65001b Moved 'workspace_name_font' from the Screen to a Workspace object in the global namespace
9e103a46e9 Variable workspace_count moved to the workspace object in the global namespace
e5ae684d02 Variable last_workspace moved to workspace object in global namespace
c610b8d7ce Variable current_workspace moved to workspace object in global namespace
f0c5073600 Array of workspaces moved to the workspace object in the global namespace
9c252988f8 Variable workspace_menu moved to workspace object in global namespace
e86b8dcb2f Clip, Dock and Drawers menu moved to appropriate global namespace
074092f319 Removed WScreen args not used
4a7daf2322 AppIcon list moved out of WScreen
2103fe390b Variable clip_icon moved to clip object in the global namespace
014bc52531 wClipIconPaint appicon argument removed
40e1ea08b8 Varible session_state moved to global namespace
6987d4aa40 Removed WScreen argument
0de3e590ce shortcutWindows moved to w_global
2e64831fb6 Removed unused variable wapp_list
b6423a7b4f wmaker: Moved variable Screen Count into the global namespace

Signed-off-by: Carlos R. Mafra <crmafra@gmail.com>

src/misc.c

@@ -586,7 +586,7 @@ char *ExpandOptions(WScreen *scr, const char *cmdline)
 				break;
 
 			case 'W':
-				snprintf(tmpbuf, sizeof(tmpbuf), "0x%x", (unsigned int)w_global.workspace.current + 1);
+				snprintf(tmpbuf, sizeof(tmpbuf), "0x%x", (unsigned int)scr->current_workspace + 1);
 				slen = strlen(tmpbuf);
 				olen += slen;
 				nout = realloc(out, olen);