os: add graphical terminal screenshot

- wm: update z_index for unfocused windows
- core: fix echo's output

README.md

@@ -1,7 +1,7 @@
 <h1 align="center">lilith</h1>
 
 <p align="center">
-<img src="./img/screenshot-wm.png" alt="screenshot of lilith"/>
+<img src="./img/screenshot-terms.png" alt="screenshot of lilith"/>
 </p>
 
 <p align="center">

userspace/applications/core/echo.c

@@ -1,8 +1,10 @@
 #include <stdio.h>
 
 int main(int argc, char **argv) {
-    for(int i = 1; i < argc; i++) {
-        printf("%s", argv[i]);
+    for(int i = 1; i < argc - 1; i++) {
+        printf("%s ", argv[i]);
     }
+    if (argc > 0)
+    	printf("%s\n", argv[argc - 1]);
     return 0;
 }

userspace/applications/wm/wm.c

@@ -336,11 +336,12 @@ int main(int argc, char **argv) {
                     int old_wid = wm.focused_wid;
                     struct wm_window *focused_win = NULL;
                     for(int i = wm.nwindows; i >= 0; i--) {
-                        if (wm.windows[i].type == WM_WINDOW_PROG &&
-                            point_in_win_prog(&wm.windows[i].as.prog, sprite->x, sprite->y)) {
-                            wm.focused_wid = wm.windows[i].wid;
-                            focused_win = &wm.windows[i];
-                            break;
+                        if (wm.windows[i].type == WM_WINDOW_PROG) {
+                            if(point_in_win_prog(&wm.windows[i].as.prog, sprite->x, sprite->y) && !focused_win) {
+                                wm.focused_wid = wm.windows[i].wid;
+                                focused_win = &wm.windows[i];
+                            }
+                            wm.windows[i].z_index = 1;
                         }
                     }
                     if(old_wid != wm.focused_wid && focused_win) {