FdoSecrets: Improve client executable path handling (#6915)

* Fixes #6459 

Improves the overall handling of FdoSecrets showing client executable paths to the user. It does the following:

* Check executable file existence as described in [RFC] fdosecrets: add optional confirmation to secret access (#4733)
* Show application PID and dbus address in the client list
* When the executable file is inaccessible, depending on where the client name is shown:
    * when shown inline, e.g. in notification text, where space is limited, clearly say that the path is invalid
    * when shown in auth dialog, show warning and print detailed info about the client
    * when shown in the client list, draw a warning icon

Co-authored-by: Jonathan White <support@dmapps.us>

share/translations/keepassxc_en.ts

@@ -66,10 +66,6 @@
         <source>Remember</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <source>Allow access to entries</source>
-        <translation type="unfinished"></translation>
-    </message>
     <message>
         <source>Allow Selected</source>
         <translation type="unfinished"></translation>
@@ -78,6 +74,30 @@
         <source>Deny All</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Non-existing/inaccessible executable path. Please double-check the client is legit.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Name</source>
+        <translation type="unfinished">Name</translation>
+    </message>
+    <message>
+        <source>PID</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Executable</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Command Line</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Details</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>AccessControlDialog::DenyButton</name>
@@ -3773,28 +3793,16 @@ Error: %1</source>
 <context>
     <name>FdoSecrets::SettingsClientModel</name>
     <message>
-        <source>Application</source>
-        <translation type="unfinished"></translation>
+        <source>Unknown</source>
+        <translation type="unfinished">Unknown</translation>
     </message>
     <message>
-        <source>Manage</source>
+        <source>Non-existing/inaccessible executable path. Please double-check the client is legit.</source>
         <translation type="unfinished"></translation>
     </message>
 </context>
 <context>
     <name>FdoSecrets::SettingsDatabaseModel</name>
-    <message>
-        <source>File Name</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <source>Group</source>
-        <translation type="unfinished">Group</translation>
-    </message>
-    <message>
-        <source>Manage</source>
-        <translation type="unfinished"></translation>
-    </message>
     <message>
         <source>Unlock to show</source>
         <translation type="unfinished"></translation>
@@ -7249,6 +7257,14 @@ Please consider generating a new key file.</source>
         <source>Please present or touch your YubiKey to continue…</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>unknown executable (DBus address %1)</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>%1 (invalid executable path)</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>QtIOCompressor</name>
@@ -7724,6 +7740,40 @@ Please consider generating a new key file.</source>
         <translation type="unfinished"></translation>
     </message>
 </context>
+<context>
+    <name>SettingsClientModel</name>
+    <message>
+        <source>Application</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>PID</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>DBus Address</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Manage</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
+    <name>SettingsDatabaseModel</name>
+    <message>
+        <source>File Name</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Group</source>
+        <translation type="unfinished">Group</translation>
+    </message>
+    <message>
+        <source>Manage</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
 <context>
     <name>SettingsWidgetFdoSecrets</name>
     <message>