Commit info popup issues

1. Close the commit info popup if full commit view is entered, otherwise
   it remains on the screen with no way to close it.
2. Check that the saved window is valid before attempting to reuse it.
   This triggering an error if the blame window got closed by pressing
   escape while commit info popup is shown.

Author: Serkora

lua/blame/commit_info.lua

@@ -25,7 +25,7 @@ function CommitInfo:close(cleanup)
     then
         vim.api.nvim_win_close(self.commit_info_window, true)
     end
-    if self.saved_win and self.saved_pos then
+    if self.saved_win and self.saved_pos and vim.api.nvim_win_is_valid(self.saved_win) then
         vim.api.nvim_set_current_win(self.saved_win)
         vim.api.nvim_win_set_cursor(self.saved_win, self.saved_pos)
     end

lua/blame/views/window_view.lua

@@ -342,6 +342,9 @@ function WindowView:show_full_commit()
     local row, _ = unpack(vim.api.nvim_win_get_cursor(self.blame_window))
     local commit = self.blamed_lines[row]
     local view = self.config.commit_detail_view or "tab"
+    if self.commit_info:is_open() == true then
+        self.commit_info:close(false)
+    end
     if type(view) == 'function' then
         local path = self.blame_stack_client.file_path
         view(commit.hash, row, path)