The basic idea is we create a version header template at
"src/base/version.h.in" and the build systems are expected to replace
strings that are enclosed with @ symbols and generate
"src/base/version.h" for other source files to consume/include.
This applies to "About Dialog", "Ban List Options Dialog", "Download From URL Dialog", "IP Subnet
Whitelist Options Dialog", "Search Plugin Select Dialog", "Search Plugin Source Dialog",
"Statistics Dialog", "Speed Limit Dialog" and "Torrent Options Dialog".
Also unifies storing the dialog size under the key "Size".
