Release 2.1.2

• Update translations from zanata (de, pl updated)
• Add typing-booster.its and typing-booster.loc to avoid making the
  release descriptions and developer name in typing-booster.appdata.xml
  translatable.
• Remove code to check whether another instance of the setup tool is running.
• Add new option to avoid adding a space when committing by label or mouse
  (Resolves: #39)
• Update emoji annotations from CLDR
• Do not try to commit if index is >= the current number of candidates
  (Resolves: rhbz#1630349)
• Add test case for https://bugzilla.redhat.com/show_bug.cgi?id=1630349