ScrapBook X 1.12.32

Merge branch 'release-1.12.32'

* release-1.12.32:
  Update version info.
  core: add unicodeToUtf8() and utf8ToUnicode()
  core: organize sbCommonUtils methods
  capture: fix wrong charset for frames
  prefs: tab icons now use individual images
  prefs: remove unused prefs
  prefs: fix a potential error for getPref
  lang: replace &#...; and &#x...; entities with normal chars.
  core: centralize and optimize formatFileSize()
  core: simplify unneeded get
  core: separate console to console.jsm
  core: separate lang to lang.jsm
  core: separate Shortcut to shortcut.jsm
  core: improve the structure of core classes