Fixes and improvements (#132)

- Fix glitch when turning on WiFi: It would temporarily show "No networks found" right before starting the first scan.
- Fix spinner to use Assets.h
- Replace statusbar battery icons 
- Better statusbar icon for when WiFi is on but not connected
- Replace statusbar WiFi icons and Wifi Manage RSSI/lock icons
- Fix for crash when timer is null in I2cScanner
- Deprecate Spacer
- Fixes for toolbar layout (simplified)
- Improved ImageViewer app: center image and add filename text on the bottom
- Add LV debug params to sdkconfig.developer
- Disabled LV spinner, msgbox and window widgets. These have equivalents in Tactility.

TactilityCore/Source/StringUtils.cpp

@@ -1,6 +1,5 @@
 #include "StringUtils.h"
 #include <cstring>
-#include <iostream>
 #include <sstream>
 
 namespace tt::string {
@@ -29,6 +28,15 @@ bool getPathParent(const char* path, char* output) {
     }
 }
 
+std::string getLastPathSegment(const std::string& path) {
+    auto index = path.find_last_of('/');
+    if (index != std::string::npos) {
+        return path.substr(index + 1);
+    } else {
+        return "";
+    }
+}
+
 std::vector<std::string> split(const std::string&input, const std::string&delimiter) {
     size_t token_index = 0;
     size_t delimiter_index;

TactilityCore/Source/StringUtils.h

@@ -23,6 +23,12 @@ int findLastIndex(const char* text, size_t from_index, char find);
  */
 bool getPathParent(const char* path, char* output);
 
+/**
+ * Given a filesystem path as input, get the last segment of a path
+ * @param[in] path input path
+ */
+std::string getLastPathSegment(const std::string& path);
+
 /**
  * Splits the provided input into separate pieces with delimiter as separator text.
  * When the input string is empty, the output list will be empty too.