Fixes:

#1057: Hitting F2 with no connection node selected caused unhandled exception #1052: 'Switch to notification panel' feature does not always switch #1051: Tooltips always displayed regardless of 'Show description tooltips in connection tree' setting #1050: Config window retains access to previously selected node after loading new connections file #1045: Config window shows several incorrect properties for HTTPS connections #1040: Canceling "select panel" form does not cancel #1039: Set default theme when themes disabled #1038: Unable to add connection with active filter #1036: Exception when themes are active and options page closed on Connections then reopened #1034: Connection context menu not being translated #1030: Exception thrown if importing from port scan and no tree node is selected #1020: BackupFileKeepCount setting not limiting backup file count #1004: Duplicating root or PuTTy node through hotkey causes unhandled exception #1002: Disabling filtering without clearing keyword leaves filtered state #1001: Connection tree context menu hotkeys stop working and disappear in some cases #999: Some hotkeys stop working if File menu was called when PuTTy Saved Sessions was selected #998: Can sometimes add connection under PuTTY Sessions node #991: Error when deleting host in filtered view #971: Portable Settings now apply to any machine they are used on #961: Connections file overwritten if correct decryption password not provided #893: Removed unneeded files from build/package #868: if statement returned the same value #762: Increased button size to fit locaized text