Update i3blocks.conf

fix commands for GUI apps and iconic sign for mail
// i3-msg -q exec //

.config/i3/i3blocks.conf

@@ -43,22 +43,22 @@ markup=pango
 [terminal]
 full_text= 
 color=#807dfe
-command=xfce4-terminal
+command=i3-msg -q exec xfce4-terminal
 
 [browser]
 full_text= 
 color=#ff7f81
-command=firefox
+command=i3-msg -q exec firefox
 
 [files]
 full_text= 
 color=#7f3fbf
-command=thunar ~/
+command=i3-msg -q exec thunar ~/
 
 #[mail]
-#full_text= 
+#full_text= 
 #color=#dbcb75
-#command=thunderbird
+#command=i3-msg -q exec thunderbird
 
 [simple-2]
 full_text=: :