fix(lsp): clear context on jump_to_single_result (closes #928)

lua/fzf-lua/utils.lua

@@ -550,7 +550,14 @@ function M.get_visual_selection()
 end
 
 function M.fzf_exit()
-  vim.cmd([[lua require('fzf-lua.win').win_leave()]])
+  -- Usually called from the LSP module to exit the interface on "async" mode
+  -- when no results are found or when `jump_to_single_result` is used, when
+  -- the latter is used in "sync" mode we also need to make sure core.__CTX
+  -- is cleared or we'll have the wrong cursor coordiantes (#928)
+  return loadstring([[
+    require('fzf-lua').core.__CTX = nil
+    require('fzf-lua').win.win_leave()
+  ]])()
 end
 
 function M.fzf_winobj()