adds clear log button to menu

- clear log now static function, with
  the log being updated from file
  every time the update function is called
- menu actions always act from main activity
  so the menu isn't able to use the existing
  bump instance

app/build.gradle

@@ -8,10 +8,10 @@ android {
 
     defaultConfig {
         applicationId "com.maenle.bump"
-        minSdk 29
+        minSdk 26
         targetSdk 30
-        versionCode 1
-        versionName "1.0"
+        versionCode 3
+        versionName "0.1.1"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }