pwmgr

Update popup format and add homepage link to the "about" popup. Bump
version to 0.2.1.

Revamp display widgets. Use a listbox on the left panel and a multiline
text box in the main right panel. Bump version to 0.2.0.

Add error message if password is not specified. Also finally fix menubar
issue by creating it in a child window. Bump version to 0.1.5.

Update Dear ImGui to version 1.92.5.

Move imgui code to "external" directory.

Setting default focus on filter text box for account screen. Also adding
ImGui example program for reference.

Update Dear ImGui to v1.91.5.

Add the ability to specify the input file path as a command line argument. Bumping to v0.1.4.

Tokenize a filter criteria and then search the catalog for feach filter
criteria token.

Update catalog decode status message.