Fix invalid headers in PNG files and optimize for size

diff --git a/src/themes/Architecture/1.png b/src/themes/Architecture/1.png
index bc48927..4ac7c51 100644
--- a/src/themes/Architecture/1.png
+++ b/src/themes/Architecture/1.png
Binary files differ
diff --git a/src/themes/Architecture/2.png b/src/themes/Architecture/2.png
index 6612f95..716968c 100644
--- a/src/themes/Architecture/2.png
+++ b/src/themes/Architecture/2.png
Binary files differ
diff --git a/src/themes/Architecture/3.png b/src/themes/Architecture/3.png
index b2484ec..a971b0a 100644
--- a/src/themes/Architecture/3.png
+++ b/src/themes/Architecture/3.png
Binary files differ
diff --git a/src/themes/Architecture/4.png b/src/themes/Architecture/4.png
index 66ce367..0cab5ec 100644
--- a/src/themes/Architecture/4.png
+++ b/src/themes/Architecture/4.png
Binary files differ
diff --git a/src/themes/Architecture/5.png b/src/themes/Architecture/5.png
index 0f57c9c..099d5a3 100644
--- a/src/themes/Architecture/5.png
+++ b/src/themes/Architecture/5.png
Binary files differ
diff --git a/src/themes/Architecture/6.png b/src/themes/Architecture/6.png
index 19fa4ff..e45d084 100644
--- a/src/themes/Architecture/6.png
+++ b/src/themes/Architecture/6.png
Binary files differ
diff --git a/src/themes/Architecture/7.png b/src/themes/Architecture/7.png
index 02a6ccf..8ef349d 100644
--- a/src/themes/Architecture/7.png
+++ b/src/themes/Architecture/7.png
Binary files differ
diff --git a/src/themes/Architecture/8.png b/src/themes/Architecture/8.png
index 4c16cf0..ede4dbf 100644
--- a/src/themes/Architecture/8.png
+++ b/src/themes/Architecture/8.png
Binary files differ
diff --git a/src/themes/Architecture/Preview.png b/src/themes/Architecture/Preview.png
index a94862d..5b257d5 100644
--- a/src/themes/Architecture/Preview.png
+++ b/src/themes/Architecture/Preview.png
Binary files differ
diff --git a/src/themes/FingerPrint/1.png b/src/themes/FingerPrint/1.png
index effca9c..dde15d8 100644
--- a/src/themes/FingerPrint/1.png
+++ b/src/themes/FingerPrint/1.png
Binary files differ
diff --git a/src/themes/FingerPrint/2.png b/src/themes/FingerPrint/2.png
index fc42a11..e515bbe 100644
--- a/src/themes/FingerPrint/2.png
+++ b/src/themes/FingerPrint/2.png
Binary files differ
diff --git a/src/themes/FingerPrint/3.png b/src/themes/FingerPrint/3.png
index c775a28..65cebd4 100644
--- a/src/themes/FingerPrint/3.png
+++ b/src/themes/FingerPrint/3.png
Binary files differ
diff --git a/src/themes/FingerPrint/4.png b/src/themes/FingerPrint/4.png
index 4c4c8b5..5d8bf29 100644
--- a/src/themes/FingerPrint/4.png
+++ b/src/themes/FingerPrint/4.png
Binary files differ
diff --git a/src/themes/FingerPrint/5.png b/src/themes/FingerPrint/5.png
index 8966bcc..2aa95aa 100644
--- a/src/themes/FingerPrint/5.png
+++ b/src/themes/FingerPrint/5.png
Binary files differ
diff --git a/src/themes/FingerPrint/6.png b/src/themes/FingerPrint/6.png
index c35fa1d..82b332f 100644
--- a/src/themes/FingerPrint/6.png
+++ b/src/themes/FingerPrint/6.png
Binary files differ
diff --git a/src/themes/FingerPrint/7.png b/src/themes/FingerPrint/7.png
index 7907b59..588d027 100644
--- a/src/themes/FingerPrint/7.png
+++ b/src/themes/FingerPrint/7.png
Binary files differ
diff --git a/src/themes/FingerPrint/8.png b/src/themes/FingerPrint/8.png
index 5ef96ff..9656de1 100644
--- a/src/themes/FingerPrint/8.png
+++ b/src/themes/FingerPrint/8.png
Binary files differ
diff --git a/src/themes/FingerPrint/Preview.png b/src/themes/FingerPrint/Preview.png
index 10b6679..a9a6e22 100644
--- a/src/themes/FingerPrint/Preview.png
+++ b/src/themes/FingerPrint/Preview.png
Binary files differ
diff --git a/src/themes/MoodinKDE/Preview.png b/src/themes/MoodinKDE/Preview.png
index 545eace..c54e5a9 100644
--- a/src/themes/MoodinKDE/Preview.png
+++ b/src/themes/MoodinKDE/Preview.png
Binary files differ