Quicksilver 1.5.1

What's new in this version:

New:
- When renaming a file and the new name conflicts with an existing file, you will be asked what to do (#519, #2293)

Fixed:
- Keep the third pane visible when it contains something, even if it's optional (#2234, #2235)
- Improve the results in the third pane for AppleScript actions (#2071, #2232)
- Removed potential deadlocks related to the task viewer (#1611)
- Improved reliability when automatically showing/hiding the task viewer (#1611)
- Avoid a hang during catalog indexing (#2016, #2241)
- Correctly reset the third pane (#2201, #2239)
- Avoid a hang when getting the string value for multiple selected objects (#2242, #2243)
- Make the left arrow key do something useful in more contexts (#2228, #2229)
- Prevent duplicate items from appearing in the interface (#2097, #2231)
- Make sure mnemonics are updated before resetting the search string (#2269)
- Icons for proxy objects are shown more reliably (#2069, #2179)
- Icons for objects in a collection are shown more reliably (#2179)
- Crash prevention and general improvements for the file conflict panel (#2293)
- Fixed a bug related to alerts (#2296)
- When dropping multiple files on the interface, turn them into a collection (#2263)

Changed:
- Quicksilver now requires OS X 10.10 or later (#2146)
- Don't show a "Relaunch Required" alert for plug-ins when the application itself is being updated (#2224)
- The main section of the Preferences is now called "General" instead of "Preferences" (#1306, #2237)
- The ⌫ key only removes a single character from the search string by default. The old behavior of clearing the entire string can be restored in Preferences → General → Extras (#177, #2249)
- If the search string is empty, pressing ⌫ will remove the selected object from the interafce (#2249)
- The option to show other results with ↓ is now called "Manually" instead of "Never" (#1878, #2244)
- Tasks appear in the task viewer briefly after completing so you can at least see what they were (#1611)
- The real object referred to by a proxy object will be remembered as long as the proxy is selected in the interface. Previously, the proxy would "expire" and look up the real object again. (#2179)
- Disable App Transport Security to allow right-arrowing into URLs (#2251, #2292)

Development:
- Clean-up to reduce deprecation warnings (#2238)
- Fixed the unit test for QSObject equality (#2240)
- Tell Travis to use a specific Xcode version (#2237)
- Major cleanup of the QSTask class and its API (#1611)
- Added a method to test for macOS Sierra (#2248)
- Deprecate some table view methods Apple provides equivalents for (#2254)
- Define formal protocols for QSObjectSource and QSObjectHandler (#2250)
- Add a method to the NSApplication interface to make Xcode 8 happy (#2270)
- Proxy object no longer use cacheTimeForProxy: (#2179)
- Overhaul of QSAlertManager and notifications (#2146)
- Modernized methods that report OS version (#2295)
- Deployment target changed to 10.10 (#2295)
- Deployment for most NIBs changed to track the project's deployment target (#2295)