Small jQuery plugin for resizing panels

Still doesn't save the size, since we want to save this in the user. Which is not implemented yet.

src/styles/_base.sass

@@ -44,13 +44,15 @@ nav.sidebar
 
 #col_sidebar
 	width: $sidebar-width
+	min-width: $sidebar-width
 
 #col_left, #col_main, #col_right
 	display: flex
 	flex-direction: column
 	position: relative
-	flex: 1
+	flex: 0 0 auto
 	height: 100%
+	min-width: 150px
 
 #col_main
 	background-color: white
@@ -58,6 +60,7 @@ nav.sidebar
 
 #col_right
 	background-color: $color-background-light
+	flex: 1 1 auto
 
 .col_header
 	position: relative
@@ -84,6 +87,15 @@ nav.sidebar
 	background-color: white
 	border-bottom: thin solid $color-background
 
+.col-splitter
+	flex: 0 0 auto
+	width: 8px
+	background-color: $color-background
+	min-height: 200px
+	cursor: col-resize
+	position: relative
+	z-index: 1
+
 .input-group-flex
 	display: flex
 
@@ -154,6 +166,7 @@ select.input-transparent
 	.table-cell-spacer
 		background-color: $color-background-light
 		width: 6px
+		min-width: 4px
 		height: 100%
 		display: table-cell
 		border: 2px solid $color-background