Automatically build bashed patch after BAIN installation

option to automatically bash a new patch after a mod is installed with BAIN. This can only be enabled if BOSS is installed and "autorun BOSS" is enabled. With this feature, Wrye Bash will achieve the same ease of use as OBMM, but with far superior functionality.

The existing bashed patch config will be loaded in the patchers, which will autoenable mods in the patchers as appropriate, then creation of the patch will begin without bringing up the patch config dialog. When autobashing, patcher settings will not be saved, so if the user wants to make manual changes, the patch dialog will come up with all the new mods since the last manual bashing bolded.

For this to work seamlessly in the UI, bashed patch creation should take place in a separate thread or process so the UI is still usable. If an additional mod is installed or a mod is uninstalled, the current patch should be aborted and another one started, all without interrupting the user flow. the progress bar (with manual cancel button) could be integrated into the status bar.

question: what if multiple bashed patches exist? prefer "Bashed Patch, Auto.esp"? prefer first one in mtime order? prefer first enabled one?