fix: ensure the correct window is activated on complete

When you complete a completion the completion window is no longer
activated after the callback is run. This was causing issues with the
incorrect window being active after the completion.

This will lead the way for more actions other then edit, that will be
comming soon.

Fixes-issue: #8

lua/ivy/controller.lua

@@ -37,7 +37,9 @@ controller.update = function(text)
 end
 
 controller.complete = function()
-  controller.checkpoint()
+  vim.api.nvim_set_current_win(window.origin)
+  controller.callback(window.get_current_selection())
+
   controller.destroy()
 end
 

lua/ivy/window_test.lua

@@ -0,0 +1,30 @@
+local window = require "ivy.window"
+
+before_each(function()
+  -- Mock the global vim functions we are using in the prompt
+  _G.vim = {
+    notify = function() end,
+    api = {
+      nvim_echo = function() end,
+      nvim_get_current_win = function()
+        return 10
+      end,
+      nvim_command = function() end,
+      nvim_win_get_buf = function()
+        return 10
+      end,
+      nvim_win_set_option = function() end,
+      nvim_buf_set_option = function() end,
+      nvim_buf_set_var = function() end,
+      nvim_buf_set_keymap = function() end,
+    },
+  }
+end)
+
+it("can initialize", function(t)
+  window.initialize()
+
+  if window.get_buffer() ~= 10 then
+    t.error("The windows buffer should be 10 found " .. window.get_buffer())
+  end
+end)