Add ability to copy password from password manager

Interfaces/iTermPasswordManager.xib

 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="11762" systemVersion="16E195" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none">
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="11762"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="12121"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <objects>
@@ -32,7 +32,7 @@
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <clipView key="contentView" id="yan-v0-dhd">
                             <rect key="frame" x="1" y="0.0" width="463" height="260"/>
-                            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                            <autoresizingMask key="autoresizingMask"/>
                             <subviews>
                                 <tableView verticalHuggingPriority="750" allowsExpansionToolTips="YES" columnAutoresizingStyle="firstColumnOnly" alternatingRowBackgroundColors="YES" columnReordering="NO" columnSelection="YES" multipleSelection="NO" autosaveColumns="NO" headerView="7EL-It-qNK" id="JC7-GD-2vC">
                                     <rect key="frame" x="0.0" y="0.0" width="463" height="243"/>
@@ -89,7 +89,7 @@
                             <autoresizingMask key="autoresizingMask"/>
                         </tableHeaderView>
                     </scrollView>
-                    <searchField wantsLayer="YES" verticalHuggingPriority="750" id="PwG-br-FdK" customClass="iTermSearchField">
+                    <searchField wantsLayer="YES" verticalHuggingPriority="750" allowsCharacterPickerTouchBarItem="YES" id="PwG-br-FdK" customClass="iTermSearchField">
                         <rect key="frame" x="20" y="318" width="465" height="22"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMinY="YES"/>
                         <searchFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" selectable="YES" editable="YES" borderStyle="bezel" placeholderString="Account Name" usesSingleLineMode="YES" bezelStyle="round" id="lOy-Zp-5fu">
@@ -176,6 +176,12 @@ Gw
                         <action selector="revealPassword:" target="-2" id="afJ-HM-r97"/>
                     </connections>
                 </menuItem>
+                <menuItem title="Copy Password" id="JCZ-Y8-Qwb">
+                    <modifierMask key="keyEquivalentModifierMask"/>
+                    <connections>
+                        <action selector="copyPassword:" target="-2" id="MWE-rW-rkX"/>
+                    </connections>
+                </menuItem>
             </items>
             <point key="canvasLocation" x="-482" y="379"/>
         </menu>

sources/iTermPasswordManagerWindowController.m

@@ -268,6 +268,12 @@ static BOOL sAuthenticated;
     }
 }
+- (IBAction)copyPassword:(id)sender {
+    NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
+    [pasteboard declareTypes:@[ NSStringPboardType ] owner:self];
+    [pasteboard setString:[self selectedPassword] forType:NSStringPboardType];
+}
+
 #pragma mark - Private
 - (Class)keychain {