Don't add space to invalid TOTP strings

* Fixes #11357
* Introduces validity parameter to TOTP generator function for future use elsewhere in the code base
* Fixes this in preview panel and TOTP dialog
* Disable actions to copy/show TOTP if the settings are invalid
* Show an error message on the TOTP setup dialog if the settings are invalid
* Show a TOTP icon with an x if the settings are invalid

share/icons/application/scalable/actions/totp-invalid.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M14.47 15.08L11 13V7H12.5V12.25L15.58 14.08C15.17 14.36 14.79 14.7 14.47 15.08M13.08 19.92C12.72 19.97 12.37 20 12 20C7.58 20 4 16.42 4 12S7.58 4 12 4 20 7.58 20 12C20 12.37 19.97 12.72 19.92 13.08C20.61 13.18 21.25 13.4 21.84 13.72C21.94 13.16 22 12.59 22 12C22 6.5 17.5 2 12 2S2 6.5 2 12C2 17.5 6.47 22 12 22C12.59 22 13.16 21.94 13.72 21.84C13.4 21.25 13.18 20.61 13.08 19.92M21.12 15.46L19 17.59L16.88 15.47L15.47 16.88L17.59 19L15.47 21.12L16.88 22.54L19 20.41L21.12 22.54L22.54 21.12L20.41 19L22.54 16.88L21.12 15.46Z" /></svg>

share/icons/icons.qrc

@@ -92,6 +92,7 @@
         <file>application/scalable/actions/totp-copy.svg</file>
         <file>application/scalable/actions/totp-copy-password.svg</file>
         <file>application/scalable/actions/totp-edit.svg</file>
+        <file>application/scalable/actions/totp-invalid.svg</file>
         <file>application/scalable/actions/trash.svg</file>
         <file>application/scalable/actions/url-copy.svg</file>
         <file>application/scalable/actions/user-guide.svg</file>

share/translations/keepassxc_en.ts

@@ -724,6 +724,10 @@
         <source>Invalid placeholder: %1</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Entry has invalid TOTP settings</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>AutoTypeAssociationsModel</name>
@@ -9247,6 +9251,16 @@ This option is deprecated, use --set-key-file instead.</source>
         <source>Warning: the chosen wordlist is smaller than the minimum recommended size!</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Invalid Step</source>
+        <comment>TOTP</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Invalid Digits</source>
+        <comment>TOTP</comment>
+        <translation type="unfinished"></translation>
+    </message>
     <message>
         <source>Fit</source>
         <translation type="unfinished"></translation>
@@ -10317,6 +10331,10 @@ Example: JBSWY3DPEHPK3PXP</source>
         <source>Are you sure you want to delete TOTP settings for this entry?</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Error: secret key is invalid</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>URLEdit</name>