Main

Minor updates mainly to pwmgr to fix Gtk3.0 deprecations.

Started working on a custom search dialog. The old one is still in place
until I finish working on the new one.

Minor but important search usability improvements. Adding case
insensitive searching and removal of previous marks before starting a
new search.

Remove instances of Gtk.idle_add() in favor of a trick I discovered for
updating the UI inline.

Minor improvements to cleanup and open the password dialog automagically at start.

pwmgr v0.5.0 -- Added change detection so textview buffer contents will only be storred if they are changed.

pwmgr v0.4.0 -- Added save warning before quit dialog. Added improved state tracking. Finally, added progress pop on close to give user feedback while ramdisk cleanup is happening.

pwmgr v0.3.0 -- Improved security of encryption/decryption operations, bound ENTER to dialog OK buttons to improve ease of use, and implemented key bindings for common operations.

Modified search so that the (first) matching term scrolls into view.

Bale out if the user clicked cancel in the password dialog.