updated git ignore

Signed-off-by: Adam McNicol <adamsorders@mac.com>
added toolbar and about dialog

Signed-off-by: Adam McNicol <adamsorders@mac.com>
fixed issue where traceback error would occur if switching between tabs with no database open

Signed-off-by: Adam McNicol <adamsorders@mac.com>
set a minimum width and read only for entity description widget

Signed-off-by: Adam McNicol <adamsorders@mac.com>