Bug fixes

0f46d2c Add missing semicolons (with ESLint)
a7fcaa4 Don't inject popup if markFillable is disabled
6f05d39 Fix fillActiveElement on pages with frames
ae2b173 Use Array.from(..) for better readability
f73afa2 86d7f68 Fix empty password generation dialog

Features/improvements

69dc3db Check host app version by semantic versioning
26f9359 Improve drastically the documentation
5a60132 598b309 1e90c3f 7b3e409 Russian, French, German & English translations
9fba0f2 67c5d32 ffb685a Russian translation
79c8093 Wrap content popup into iframe for privacy reasons
e781fba Move two preferences to a new section called 'Inputs'
046acf3 ade7c4e More meaningful output in statusbar
89648a8 Own content script for each frame