Now watches for process instead of window

Deciding whether or not a tool is already up by a window existing fails
if the tool is started, but hasn’t created a window yet. This is not an
issue if watching for the _process_ to pop up.

Ideally this would also close processes instead of windows when the
watched game goes down, but killing a process from AHK sadly is
ungraceful, unlike closing a window.

CHANGELOG.md

@@ -1,3 +1,13 @@
+# devel
+
+## Changed
+
+* Now watches for a _process_ instead of a _window_ for checking if a tool is
+  already up. This means stuff isn’t started multiple times if the window takes
+  a while to pop up.
+
+-----
+
 # v0.2.0 (2021-01-20)
 
 This release adds proper support for devices beyond just Joysticks, e.g. 

focus.ahk

@@ -125,7 +125,8 @@ watchTarget() {
     ; start tools
     for ip, path in config["tools"]["paths"] {
       SplitPath, path, file
-      if (!WinExist("ahk_exe " file)) {
+      Process, Exist, %file%
+      if (!ErrorLevel) {
         Run, % path
       }
     }