string fixes

Stratum.Droid/Resources/values/strings.xml

@@ -55,7 +55,7 @@
     <string name="supportDevelopment">Support development</string>
     <string name="supportDevelopmentSummary">Support continued development and updates with Buy Me a Coffee</string>
     <string name="rate">Rate</string>
-    <string name="rateSummary">Rate Stratum on the Google Play store</string>
+    <string name="rateSummary">Rate Stratum on the Google Play Store</string>
     <string name="viewGitHub">View on GitHub</string>
     <string name="viewGitHubSummary">View the Stratum repository on GitHub. You can report an issue, request more icons and features.</string>
 
@@ -106,7 +106,7 @@
     <string name="iconPacks">Icon packs</string>
     <string name="downloadPacks">Download packs</string>
     <string name="importIconPackSuccess">Imported {0} icons from pack</string>
-    <string name="invalidIconPackError">The selected file is not an Stratum icon pack</string>
+    <string name="invalidIconPackError">The selected file is not a Stratum icon pack</string>
     <string name="confirmIconPackDelete">Are you sure you want to delete this icon pack? Any used icons will not be deleted.</string>
     <!-- View the source (website) of the icon pack -->
     <string name="viewSource">View source</string>
@@ -202,7 +202,7 @@
     <string name="googlePlayNotInstalledError">Google Play is not installed on your device</string>
     <string name="filePickerMissing">Cannot open file picker. A file manager must be installed.</string>
     <string name="filePickError">Error picking file</string>
-    <string name="invalidFileError">The selected file is not an Stratum backup</string>
+    <string name="invalidFileError">The selected file is not a Stratum backup</string>
     <string name="webBrowserMissing">No web browser installed</string>
     <string name="emailClientMissing">No email client installed</string>
     <string name="genericError">An error occurred</string>