fix: latest version warnings can be less eager

frontend/src/lib/components/VersionChecker/versionCheckerLogic.ts

@@ -184,19 +184,20 @@ export const versionCheckerLogic = kea<versionCheckerLogicType>([
                     let level: 'warning' | 'info' | 'error' | undefined
                     if (diff.kind === 'major' || numVersionsBehind >= 20) {
                         level = 'error'
-                    } else if ((diff.kind === 'minor' && diff.diff >= 5) || numVersionsBehind >= 10) {
+                    } else if (diff.kind === 'minor' && diff.diff >= 15) {
                         level = 'warning'
-                    } else if (diff.kind === 'minor' || numVersionsBehind >= 5) {
+                    } else if ((diff.kind === 'minor' && diff.diff >= 10) || numVersionsBehind >= 10) {
                         level = 'info'
                     } else if (latestUsedVersion.extra) {
-                        // if we have an extra (alpha/beta/rc/etc) version, we should always show a warning if they aren't on the latest
+                        // if we have an extra (alpha/beta/rc/etc.) version, we should always show a warning if they aren't on the latest
                         level = 'warning'
                     } else {
                         // don't warn for a small number of patch versions behind
                         level = undefined
                     }
 
-                    if (level) {
+                    // we check if there is a "latest user version string" to avoid returning odd data in unexpected cases
+                    if (level && !!versionToString(latestUsedVersion).trim().length) {
                         warning = {
                             latestUsedVersion: versionToString(latestUsedVersion),
                             latestAvailableVersion: versionToString(latestAvailableVersion),