[loc] update Latvian translation

[ms-sys] fix for detecting windows MBRs with localised messages

* Windows MBRs contain localised strings which mean the bytes between the
  executable code and the disk signature / partition table can change depending
  on locale. This patch adds lengths to reflect the offsets which are the same
  for every locale, and only compares these lengths when detecting existing
  Windows MBRs.

[loc] fix two strings in the Czech translation

* Closes pbatard#827

v2.11 (build 995)

[core] add a workaround for >1TB HDDs that mistakenly report short wr…

…ites

* It appears that 1.5TB and 2TB HDDs, accessed trough some Seagate ow WD USB ↔ SATA
  controllers, can report that 0 bytes were written on WriteFile(), even though all
  the data was effectively written. 1TB HDDs, accessed through the same controller,
  do not report this issue. So add a workaround for that.
* Also see pbatard#787

[core] fix sanitizing of exFAT labels

* Closes pbatard#818

[core] add half workaround for an XP issue

* This is not a complete workaround, but it will do for
  until we drop support for XP altogether.
* Closes pbatard#810

[appveyor] remove unneeded project duplication for MinGW

[ui] fix UI font for XP users

* DIE, XP, DIE!!!!
* Closes pbatard#820

[misc] add a cheat mode to disable file indexing after format

* New cheat mode is Alt-Q, and gets preserved between sessions
* Only for file systems that support it (NTFS, UDF and ReFS)