With this PR we refactor `StringUtils::replaceAll` to accept `string_view` as suggested in a code comment. In addition, while we are touching this rebuild happy file, we slim it down a bit by moving a few sparingly used functions elsewhere.
openmw/mwgui/bookpage.cpp:394:13: warning: ‘*((void*)& stream +24)’ may be used uninitialized in this function [-Wmaybe-uninitialized]
Signed-off-by: Lukasz Gromanowski <lgromanowski@gmail.com>