Remap/remove keybindings to avoid i8n key conflicts

[damieng]

As part of our efforts to support international keyboards we are remapping various ctrl-alt keybindings. This change makes the following adjusments to find and replace keybindings on Windows and Linux only;

• show-replace keybinding is removed
• toggle-case-option changes to ctrlshiftc
• toggle-selection-option keybinding is removed
• toggle-whole-word-option keybinding is removed

[maxbrunsfeld]

Should we just remove some of these bindings on windows, and let people bind them themselves if they want?

Like, what about keeping only ctrl-shift-c for case sensitivity?

[damieng]

I'm always up for less default keybindings hence the removal of show-replace (you can't use replace without find anyway).

I like the idea of just having case-sensitive. Do you want to keep all the mac bindings?

[maxbrunsfeld]

I think we should keep the mac ones.