Icons big cleanup (#1728)

* full icon review, simplification and standarization:
- all icons share the same template (with grid and guides)
- simplified svg code
- changed names for better organization:
	- italic > text-italic
	- justify-center > align-justify-left
	- underline > text-underline
- updated previous design with Olive icons guideline
- created new icon for text-bold in case it is needed
- updated design for align-center, right and left to follow Olive icons guideline
- created new icons for alignements in case they are needed:
	- align-justify-all
	- align-justify-center
	- align-justify-left
	- align-justify-right
- updated .qrc files
- updated all .png files

* added missing "mini-map" icon

* fixed SVGs docnames and default export-filenames

* more cleanup and standarization to recently updated icons:
- align-justify-all
- align-justify-center
- align-justify-left
- align-justify-right
- text-bold
- text-italic
- text-underline

* changed some unused colors to #212121 in case the files are edited in the future, now they are set to the correct color

app/ui/style/olive-dark/olive-dark.qrc

@@ -18,6 +18,22 @@
     <file>png/align-center.32.png</file>
     <file>png/align-center.64.png</file>
     <file>png/align-center.128.png</file>
+    <file>png/align-justify-all.16.png</file>
+    <file>png/align-justify-all.32.png</file>
+    <file>png/align-justify-all.64.png</file>
+    <file>png/align-justify-all.128.png</file>
+    <file>png/align-justify-center.16.png</file>
+    <file>png/align-justify-center.32.png</file>
+    <file>png/align-justify-center.64.png</file>
+    <file>png/align-justify-center.128.png</file>
+    <file>png/align-justify-left.16.png</file>
+    <file>png/align-justify-left.32.png</file>
+    <file>png/align-justify-left.64.png</file>
+    <file>png/align-justify-left.128.png</file>
+    <file>png/align-justify-right.16.png</file>
+    <file>png/align-justify-right.32.png</file>
+    <file>png/align-justify-right.64.png</file>
+    <file>png/align-justify-right.128.png</file>
     <file>png/align-left.16.png</file>
     <file>png/align-left.32.png</file>
     <file>png/align-left.64.png</file>
@@ -94,14 +110,6 @@
     <file>png/import.32.png</file>
     <file>png/import.64.png</file>
     <file>png/import.128.png</file>
-    <file>png/italic.16.png</file>
-    <file>png/italic.32.png</file>
-    <file>png/italic.64.png</file>
-    <file>png/italic.128.png</file>
-    <file>png/justify-center.16.png</file>
-    <file>png/justify-center.32.png</file>
-    <file>png/justify-center.64.png</file>
-    <file>png/justify-center.128.png</file>
     <file>png/listview.16.png</file>
     <file>png/listview.32.png</file>
     <file>png/listview.64.png</file>
@@ -210,6 +218,18 @@
     <file>png/smooth_edges.32.png</file>
     <file>png/smooth_edges.64.png</file>
     <file>png/smooth_edges.128.png</file>
+    <file>png/text-bold.16.png</file>
+    <file>png/text-bold.32.png</file>
+    <file>png/text-bold.64.png</file>
+    <file>png/text-bold.128.png</file>
+    <file>png/text-italic.16.png</file>
+    <file>png/text-italic.32.png</file>
+    <file>png/text-italic.64.png</file>
+    <file>png/text-italic.128.png</file>
+    <file>png/text-underline.16.png</file>
+    <file>png/text-underline.32.png</file>
+    <file>png/text-underline.64.png</file>
+    <file>png/text-underline.128.png</file>
     <file>png/transition-tool.16.png</file>
     <file>png/transition-tool.32.png</file>
     <file>png/transition-tool.64.png</file>
@@ -234,10 +254,6 @@
     <file>png/tri-up.32.png</file>
     <file>png/tri-up.64.png</file>
     <file>png/tri-up.128.png</file>
-    <file>png/underline.16.png</file>
-    <file>png/underline.32.png</file>
-    <file>png/underline.64.png</file>
-    <file>png/underline.128.png</file>
     <file>png/undo.16.png</file>
     <file>png/undo.32.png</file>
     <file>png/undo.64.png</file>