changelog update
Merge branch 'develop' of github.com:akhodakivskiy/VimFx into develop
Bump minimum requred Firefox version to 23. Closes #228
Find refactoring
Enable highligh find mode with a/
The previous two commits close #187, close #226
Bump minimum Firefox version to 25

Since we now use Firefox 25's built in find bar.
Code Review comments per @lydell
Refix #115 after switching to built-in findbar
Simplify command_esc findbar hiding
Clean up find mode
Auto-focus findbar in find mode onInput

Now, if you unfocus the text input of the findbar, it will be
automatically focused again when you start typing. Before, nothing at all
happened (commands weren't run either), which felt really weird. This
reminds you that you're still in find mode, and need to press Enter or Esc
to exit from it.
Make mode entering consistent with find mode enter
Minor fixes
Always open regular find bar, not last used

There are three find bars: The "regular" one, the "quick find" one and the
"quick find (link only)" one. Before, the VimFx `/` command opened the one
of those three that was used last. Now, the regular is always opened.
Make button click depend on current mode. Fix #243

Both insert mode and disabled mode use the same greyed out icon for the
toolbar button. If you're in insert mode and click the button, we used to
disable the extension as normal. However, it felt like clicking the button
did nothing, because the icon didn't change. Even if it _would_ change, it
feels more natural if the extension is _enabled_ again at that point. So
now, if you're in insert mode and click the button, we enter normal mode.
(#243)

If the current site is blacklisted, clicking the button used to disable
the extension. Well, it was already disabled, but the button icon changed
from the blacklisted icon (red) to the disabled icon (grey). Clicking
again went back to blacklisted mode. That's pretty weird. Now we open the
menu popup when clicked instead, which will show the trash can icon which
is used to un-blacklist the site. Un-blacklisting directly when clicking
the button would be to go too far, since that can potentially remove more
blacklisting rules than the user wants to. Using the popup you have a
chance to review what will be removed when un-blacklisting.

To sum up, the button clicking is more intuitive now:

- If enabled: Disable
- Otherwise: Enable (almost)
Merge pull request #240 from lydell/minor-fixes

Minor fixes
Merge pull request #239 from lydell/find-fixes

Find fixes
Merge pull request #244 from lydell/button-mode-click

Make button click depend on current mode. Fix #243
Merge pull request #238 from lydell/develop

Bump minimum Firefox version to 25