Bug fixes & small improvements

[IDA] Fixed issue #8
[IDA] New options for python editor added: font (+size), tab size
[IDA] Now Memory choose dialog allows to specify region size by "size" and "VA to" on manual select
[IDA] Now Memory choose dialog allows to import some memory pages with overrided "RWE" protect using context menu
[IDA] Manual memory range validation fixed in Memory choose dialog
[IDA] New shortcut Alt+Shift+R is added for "Synchronize now" feature